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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Adverse Reactions and Drug–Drug Interactions in the Management of Women with Postmenopausal Osteoporosis</title><author><name sortKey="Rizzoli, Rene" sort="Rizzoli, Rene" uniqKey="Rizzoli R" first="René" last="Rizzoli">René Rizzoli</name><affiliation><nlm:aff id="Aff1">Division of Bone Disease, Department of Rehabilitation and Geriatrics, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland</nlm:aff></affiliation></author><author><name sortKey="Reginster, Jean Yves" sort="Reginster, Jean Yves" uniqKey="Reginster J" first="Jean-Yves" last="Reginster">Jean-Yves Reginster</name><affiliation><nlm:aff id="Aff2">Department of Public Health and Health Economics, University of Liège, Liège, Belgium</nlm:aff></affiliation></author><author><name sortKey="Boonen, Steven" sort="Boonen, Steven" uniqKey="Boonen S" first="Steven" last="Boonen">Steven Boonen</name><affiliation><nlm:aff id="Aff3">Leuven University Center for Metabolic Bone Disease and Division of Geriatric Medicine, Katholieke Universiteit Leuven, Leuven, Belgium</nlm:aff></affiliation></author><author><name sortKey="Breart, Gerard" sort="Breart, Gerard" uniqKey="Breart G" first="Gérard" last="Bréart">Gérard Bréart</name><affiliation><nlm:aff id="Aff4">INSERM U953, Hôpital Tenon, Paris, France</nlm:aff></affiliation></author><author><name sortKey="Diez Perez, Adolfo" sort="Diez Perez, Adolfo" uniqKey="Diez Perez A" first="Adolfo" last="Diez-Perez">Adolfo Diez-Perez</name><affiliation><nlm:aff id="Aff5">Department of Internal Medicine, Autonomous University of Barcelona, Hospital del Mar, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Felsenberg, Dieter" sort="Felsenberg, Dieter" uniqKey="Felsenberg D" first="Dieter" last="Felsenberg">Dieter Felsenberg</name><affiliation><nlm:aff id="Aff6">Center of Muscle and Bone Research, Charité–University Medicine, Campus Benjamin Franklin, Berlin, Germany</nlm:aff></affiliation></author><author><name sortKey="Kaufman, Jean Marc" sort="Kaufman, Jean Marc" uniqKey="Kaufman J" first="Jean-Marc" last="Kaufman">Jean-Marc Kaufman</name><affiliation><nlm:aff id="Aff7">Department of Endocrinology and Unit for Osteoporosis and Metabolic Bone Diseases, Ghent University Hospital, Ghent, Belgium</nlm:aff></affiliation></author><author><name sortKey="Kanis, John A" sort="Kanis, John A" uniqKey="Kanis J" first="John A." last="Kanis">John A. Kanis</name><affiliation><nlm:aff id="Aff8">WHO Collaborating Centre for Metabolic Bone Diseases, University of Sheffield Medical School, Sheffield, UK</nlm:aff></affiliation></author><author><name sortKey="Cooper, Cyrus" sort="Cooper, Cyrus" uniqKey="Cooper C" first="Cyrus" last="Cooper">Cyrus Cooper</name><affiliation><nlm:aff id="Aff9">MRC Epidemiology Resource Centre, University of Southampton, Southampton, UK</nlm:aff></affiliation><affiliation><nlm:aff id="Aff10">NIHR Musculoskeletal Biomedical Research Unit, Department of Musculoskeletal Science, University of Oxford, Oxford, UK</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">21637997</idno><idno type="pmc">3135835</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3135835</idno><idno type="RBID">PMC:3135835</idno><idno type="doi">10.1007/s00223-011-9499-8</idno><date when="2011">2011</date><idno type="wicri:Area/Pmc/Corpus">000198</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Adverse Reactions and Drug–Drug Interactions in the Management of Women with Postmenopausal Osteoporosis</title><author><name sortKey="Rizzoli, Rene" sort="Rizzoli, Rene" uniqKey="Rizzoli R" first="René" last="Rizzoli">René Rizzoli</name><affiliation><nlm:aff id="Aff1">Division of Bone Disease, Department of Rehabilitation and Geriatrics, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland</nlm:aff></affiliation></author><author><name sortKey="Reginster, Jean Yves" sort="Reginster, Jean Yves" uniqKey="Reginster J" first="Jean-Yves" last="Reginster">Jean-Yves Reginster</name><affiliation><nlm:aff id="Aff2">Department of Public Health and Health Economics, University of Liège, Liège, Belgium</nlm:aff></affiliation></author><author><name sortKey="Boonen, Steven" sort="Boonen, Steven" uniqKey="Boonen S" first="Steven" last="Boonen">Steven Boonen</name><affiliation><nlm:aff id="Aff3">Leuven University Center for Metabolic Bone Disease and Division of Geriatric Medicine, Katholieke Universiteit Leuven, Leuven, Belgium</nlm:aff></affiliation></author><author><name sortKey="Breart, Gerard" sort="Breart, Gerard" uniqKey="Breart G" first="Gérard" last="Bréart">Gérard Bréart</name><affiliation><nlm:aff id="Aff4">INSERM U953, Hôpital Tenon, Paris, France</nlm:aff></affiliation></author><author><name sortKey="Diez Perez, Adolfo" sort="Diez Perez, Adolfo" uniqKey="Diez Perez A" first="Adolfo" last="Diez-Perez">Adolfo Diez-Perez</name><affiliation><nlm:aff id="Aff5">Department of Internal Medicine, Autonomous University of Barcelona, Hospital del Mar, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Felsenberg, Dieter" sort="Felsenberg, Dieter" uniqKey="Felsenberg D" first="Dieter" last="Felsenberg">Dieter Felsenberg</name><affiliation><nlm:aff id="Aff6">Center of Muscle and Bone Research, Charité–University Medicine, Campus Benjamin Franklin, Berlin, Germany</nlm:aff></affiliation></author><author><name sortKey="Kaufman, Jean Marc" sort="Kaufman, Jean Marc" uniqKey="Kaufman J" first="Jean-Marc" last="Kaufman">Jean-Marc Kaufman</name><affiliation><nlm:aff id="Aff7">Department of Endocrinology and Unit for Osteoporosis and Metabolic Bone Diseases, Ghent University Hospital, Ghent, Belgium</nlm:aff></affiliation></author><author><name sortKey="Kanis, John A" sort="Kanis, John A" uniqKey="Kanis J" first="John A." last="Kanis">John A. Kanis</name><affiliation><nlm:aff id="Aff8">WHO Collaborating Centre for Metabolic Bone Diseases, University of Sheffield Medical School, Sheffield, UK</nlm:aff></affiliation></author><author><name sortKey="Cooper, Cyrus" sort="Cooper, Cyrus" uniqKey="Cooper C" first="Cyrus" last="Cooper">Cyrus Cooper</name><affiliation><nlm:aff id="Aff9">MRC Epidemiology Resource Centre, University of Southampton, Southampton, UK</nlm:aff></affiliation><affiliation><nlm:aff id="Aff10">NIHR Musculoskeletal Biomedical Research Unit, Department of Musculoskeletal Science, University of Oxford, Oxford, UK</nlm:aff></affiliation></author></analytic><series><title level="j">Calcified Tissue International</title><idno type="ISSN">0171-967X</idno><idno type="eISSN">1432-0827</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The pharmacological management of disease should involve consideration of the balance between the beneficial effects of treatment on outcome and the probability of adverse effects. The aim of this review is to explore the risk of adverse drug reactions and drug–drug interactions with treatments for postmenopausal osteoporosis. We reviewed evidence for adverse reactions from regulatory documents, randomized controlled trials, pharmacovigilance surveys, and case series. Bisphosphonates are associated with gastrointestinal effects, musculoskeletal pain, and acute-phase reactions, as well as, very rarely, atrial fibrillation, atypical fracture, delayed fracture healing, osteonecrosis of the jaw, hypersensitivity reactions, and renal impairment. Cutaneous effects and osteonecrosis of the jaw are of concern for denosumab (both very rare), though there are no pharmacovigilance data for this agent yet. The selective estrogen receptor modulators are associated with hot flushes, leg cramps, and, very rarely, venous thromboembolism and stroke. Strontium ranelate has been linked to hypersensitivity reactions and venous thromboembolism (both very rare) and teriparatide with headache, nausea, dizziness, and limb pain. The solidity of the evidence base depends on the frequency of the reaction, and causality is not always easy to establish for the very rare adverse reactions. Drug–drug interactions are rare. Osteoporosis treatments are generally safe and well tolerated, though they are associated with a few very rare serious adverse reactions. While these are a cause for concern, the risk should be weighed against the benefits of treatment itself, i.e., the prevention of osteoporotic fracture.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Melton, Lj" uniqKey="Melton L">LJ Melton</name></author><author><name sortKey="Gabriel, Se" uniqKey="Gabriel S">SE Gabriel</name></author><author><name sortKey="Crowson, Cs" uniqKey="Crowson C">CS Crowson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sambrook, P" uniqKey="Sambrook P">P Sambrook</name></author><author><name sortKey="Cooper, C" uniqKey="Cooper C">C Cooper</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Edwards, Ir" uniqKey="Edwards I">IR Edwards</name></author><author><name sortKey="Aronson, Jk" uniqKey="Aronson J">JK Aronson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Katz, Md" 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Calcif Tissue Int</journal-id><journal-title-group><journal-title>Calcified Tissue International</journal-title></journal-title-group><issn pub-type="ppub">0171-967X</issn><issn pub-type="epub">1432-0827</issn><publisher><publisher-name>Springer-Verlag</publisher-name><publisher-loc>New York</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">21637997</article-id><article-id pub-id-type="pmc">3135835</article-id><article-id pub-id-type="publisher-id">9499</article-id><article-id pub-id-type="doi">10.1007/s00223-011-9499-8</article-id><article-categories><subj-group subj-group-type="heading"><subject>Review</subject></subj-group></article-categories><title-group><article-title>Adverse Reactions and Drug–Drug Interactions in the Management of Women with Postmenopausal Osteoporosis</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Rizzoli</surname><given-names>René</given-names></name><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author" corresp="yes"><name><surname>Reginster</surname><given-names>Jean-Yves</given-names></name><address><phone>+32-4-2703257</phone><fax>+32-4-2703253</fax><email>jyreginster@ulg.ac.be</email></address><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Boonen</surname><given-names>Steven</given-names></name><xref ref-type="aff" rid="Aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Bréart</surname><given-names>Gérard</given-names></name><xref ref-type="aff" rid="Aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Diez-Perez</surname><given-names>Adolfo</given-names></name><xref ref-type="aff" rid="Aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Felsenberg</surname><given-names>Dieter</given-names></name><xref ref-type="aff" rid="Aff6">6</xref></contrib><contrib contrib-type="author"><name><surname>Kaufman</surname><given-names>Jean-Marc</given-names></name><xref ref-type="aff" rid="Aff7">7</xref></contrib><contrib contrib-type="author"><name><surname>Kanis</surname><given-names>John A.</given-names></name><xref ref-type="aff" rid="Aff8">8</xref></contrib><contrib contrib-type="author"><name><surname>Cooper</surname><given-names>Cyrus</given-names></name><xref ref-type="aff" rid="Aff9">9</xref><xref ref-type="aff" rid="Aff10">10</xref></contrib><aff id="Aff1"><label>1</label>Division of Bone Disease, Department of Rehabilitation and Geriatrics, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland</aff><aff id="Aff2"><label>2</label>Department of Public Health and Health Economics, University of Liège, Liège, Belgium</aff><aff id="Aff3"><label>3</label>Leuven University Center for Metabolic Bone Disease and Division of Geriatric Medicine, Katholieke Universiteit Leuven, Leuven, Belgium</aff><aff id="Aff4"><label>4</label>INSERM U953, Hôpital Tenon, Paris, France</aff><aff id="Aff5"><label>5</label>Department of Internal Medicine, Autonomous University of Barcelona, Hospital del Mar, Barcelona, Spain</aff><aff id="Aff6"><label>6</label>Center of Muscle and Bone Research, Charité–University Medicine, Campus Benjamin Franklin, Berlin, Germany</aff><aff id="Aff7"><label>7</label>Department of Endocrinology and Unit for Osteoporosis and Metabolic Bone Diseases, Ghent University Hospital, Ghent, Belgium</aff><aff id="Aff8"><label>8</label>WHO Collaborating Centre for Metabolic Bone Diseases, University of Sheffield Medical School, Sheffield, UK</aff><aff id="Aff9"><label>9</label>MRC Epidemiology Resource Centre, University of Southampton, Southampton, UK</aff><aff id="Aff10"><label>10</label>NIHR Musculoskeletal Biomedical Research Unit, Department of Musculoskeletal Science, University of Oxford, Oxford, UK</aff></contrib-group><pub-date pub-type="epub"><day>3</day><month>6</month><year>2011</year></pub-date><pub-date pub-type="pmc-release"><day>3</day><month>6</month><year>2011</year></pub-date><pub-date pub-type="ppub"><month>8</month><year>2011</year></pub-date><volume>89</volume><issue>2</issue><fpage>91</fpage><lpage>104</lpage><history><date date-type="received"><day>28</day><month>11</month><year>2010</year></date><date date-type="accepted"><day>31</day><month>3</month><year>2011</year></date></history><permissions><copyright-statement>© The Author(s) 2011</copyright-statement></permissions><abstract id="Abs1"><p>The pharmacological management of disease should involve consideration of the balance between the beneficial effects of treatment on outcome and the probability of adverse effects. The aim of this review is to explore the risk of adverse drug reactions and drug–drug interactions with treatments for postmenopausal osteoporosis. We reviewed evidence for adverse reactions from regulatory documents, randomized controlled trials, pharmacovigilance surveys, and case series. Bisphosphonates are associated with gastrointestinal effects, musculoskeletal pain, and acute-phase reactions, as well as, very rarely, atrial fibrillation, atypical fracture, delayed fracture healing, osteonecrosis of the jaw, hypersensitivity reactions, and renal impairment. Cutaneous effects and osteonecrosis of the jaw are of concern for denosumab (both very rare), though there are no pharmacovigilance data for this agent yet. The selective estrogen receptor modulators are associated with hot flushes, leg cramps, and, very rarely, venous thromboembolism and stroke. Strontium ranelate has been linked to hypersensitivity reactions and venous thromboembolism (both very rare) and teriparatide with headache, nausea, dizziness, and limb pain. The solidity of the evidence base depends on the frequency of the reaction, and causality is not always easy to establish for the very rare adverse reactions. Drug–drug interactions are rare. Osteoporosis treatments are generally safe and well tolerated, though they are associated with a few very rare serious adverse reactions. While these are a cause for concern, the risk should be weighed against the benefits of treatment itself, i.e., the prevention of osteoporotic fracture.</p></abstract><kwd-group><title>Keywords</title><kwd>Osteoporosis</kwd><kwd>Adverse drug reaction</kwd><kwd>Drug–drug interaction</kwd><kwd>Bisphosphonate</kwd><kwd>Denosumab</kwd><kwd>SERM</kwd><kwd>Strontium ranelate</kwd><kwd>Teriparatide</kwd></kwd-group><custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name><meta-value>© Springer Science+Business Media, LLC 2011</meta-value></custom-meta></custom-meta-group></article-meta></front><body><p>The management of osteoporosis is a major priority for public health. The disease affects about one-third of women over the age of 50 years, with a combined lifetime risk of hip, forearm, or vertebral fracture of around 50%, on a par with the risk associated with cardiovascular disease [<xref ref-type="bibr" rid="CR1">1</xref>]. The total direct costs in Europe were estimated at €31.7 billion in 2000 and are expected to nearly double by 2050 due to demographic changes in the population [<xref ref-type="bibr" rid="CR2">2</xref>]. Effective and safe treatments are clearly essential to reduce this burden.</p><p>Fortunately, there is currently a wide range of osteoporosis treatments, which reduce the risk for vertebral fracture from 40 to 75% and, in some cases, nonvertebral fractures by about 20% and hip fractures up to 40% [<xref ref-type="bibr" rid="CR3">3</xref>]. Like any disease, the pharmacological management of patients with osteoporosis should always involve consideration of the balance between the risk of adverse drug reactions and beneficial effects in terms of reduction in the risk of outcome. For osteoporosis, the outcome is vertebral and nonvertebral fracture, which is associated with significant levels of morbidity and disability and, in the case of vertebral and hip fracture, an increase in mortality. Treatment decisions should be made to attain the maximum reduction in risk of fracture with the minimum occurrence of adverse reactions. On the whole, osteoporosis treatments are remarkably well tolerated, though pharmacovigilance and case studies have highlighted some rare serious adverse drug reactions, which deserve further investigation.</p><p>The Working Group of the European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO) has focused on adverse reactions and drug–drug interactions in the management of women with osteoporosis. This review was prepared following these discussions.</p><p>An <italic>adverse drug reaction</italic> is defined as an unintended harmful or unpleasant response to a medicinal product, which predicts hazard for future administration and warrants prevention or specific treatment, alteration of dosage, or discontinuation [<xref ref-type="bibr" rid="CR4">4</xref>, <xref ref-type="bibr" rid="CR5">5</xref>]. In general medicine, adverse drug reactions are far more common than many physicians suppose [<xref ref-type="bibr" rid="CR5">5</xref>]. In one prospective observational analysis of nearly 20,000 hospital admissions, 6.5% of patients had some form of adverse drug reaction, mainly due to aspirin, diuretics, warfarin, and nonsteroidal anti-inflammatory drugs [<xref ref-type="bibr" rid="CR6">6</xref>]. The overall fatality in that analysis was 0.15%. Despite this, many of the reactions are preventable through proper surveillance and education of physicians and patients.</p><p>In this review, we examine the evidence for adverse drug reactions with the following osteoporosis treatments: bisphosphonates (alendronate, risedronate, ibandronate, and zoledronic acid), denosumab, selective estrogen receptor modulators (SERMs, raloxifene and bazedoxifene), strontium ranelate, teriparatide, and PTH(1–84). We report the prevalence of side effects and adverse reactions according to the definitions used by the European Medicines Agency (EMA): common (≥1/100, <1/10), uncommon (≥1/1,000, <1/100), rare (≥1/10,000, <1/1,000), and very rare (<1/10,000).</p><p>Accurate interpretation of the risk of adverse reactions and drug–drug interactions is difficult due to the variety of sources of information that provide varying levels of evidence. The detection of an adverse reaction depends on the relative frequency of the event and the temporality, the mechanism of drug-induced toxicity, the number of patients exposed to the drug, and the methods used to detect the effect. There are three main sources of information in addition to regulatory documents: randomized controlled trials (RCTs), pharmacovigilance, and case reports [<xref ref-type="bibr" rid="CR4">4</xref>]. Table <xref rid="Tab1" ref-type="table">1</xref> summarizes the source of evidence for the various adverse reactions with the osteoporosis treatments described herein and the duration of postapproval surveillance for each agent. Evidence from RCTs is restricted to the most common adverse reactions due to the small population size limited, at most, to a few thousand patients, as well as the relatively short observation times. On the other hand, rare side effects may not be detectable by RCTs and only become evident in pharmacovigilance surveys, which can cover hundreds of thousands of patients over many treatment years. Case reports also constitute an important source of information for the very rare events, though causality is not always easy to establish. It should be noted that the osteoporosis treatments that have been in clinical use for longer are more likely to have reported cases of rare adverse reactions than more recent arrivals to the therapeutic armamentarium.<table-wrap id="Tab1"><label>Table 1</label><caption><p>Source of evidence for adverse reactions to treatments in osteoporosis</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="2"></th><th align="left" colspan="3">Source of evidence</th><th align="left" rowspan="2">Duration of postapproval experience in 2010</th></tr><tr><th align="left">RCT</th><th align="left">Pharmacovigilance</th><th align="left">Case series</th></tr></thead><tbody><tr><td align="left">Bisphosphonates</td><td align="left"></td><td align="left"></td><td align="left"></td><td align="left" rowspan="9">Alendronate, 15 years<break></break>Risedronate, 10 years<break></break>Ibandronate (oral), 5 years<break></break>Ibandronate (IV), 4 years<break></break>Zoledronic acid, 3 years</td></tr><tr><td align="left"> GI effects</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Musculoskeletal pain</td><td align="left"></td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Acute-phase reactions</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Atrial fibrillation</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Atypical fracture/delayed fracture healing</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr><tr><td align="left"> Osteonecrosis of the jaw</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr><tr><td align="left"> Hypersensitivity reactions</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr><tr><td align="left"> Renal impairment</td><td align="left"></td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left">Denosumab</td><td align="left"></td><td align="left"></td><td align="left"></td><td align="left" rowspan="3">New agent</td></tr><tr><td align="left"> Severe infection</td><td align="left">✓</td><td align="left"></td><td align="left"></td></tr><tr><td align="left"> Osteonecrosis of the jaw</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr><tr><td align="left"> Cancer</td><td align="left">✓</td><td align="left"></td><td align="left"></td><td align="left"></td></tr><tr><td align="left">SERMs</td><td align="left"></td><td align="left"></td><td align="left"></td><td align="left" rowspan="6">Raloxifene, 13 years<break></break>Bazedoxifene, new agent<break></break>Lasofoxifene, new agent</td></tr><tr><td align="left"> Hot flushes</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Leg cramps</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Venous thromboembolism</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Stroke</td><td align="left">✓</td><td align="left"></td><td align="left"></td></tr><tr><td align="left"> Endometrial effects</td><td align="left">✓</td><td align="left"></td><td align="left"></td></tr><tr><td align="left">Strontium ranelate</td><td align="left"></td><td align="left"></td><td align="left"></td><td align="left" rowspan="3">8 years</td></tr><tr><td align="left"> Venous thromboembolism</td><td align="left">✓</td><td align="left"></td><td align="left"></td></tr><tr><td align="left"> Hypersensitivity reactions</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr><tr><td align="left">Teriparatide or PTH(1–84)</td><td align="left"></td><td align="left"></td><td align="left"></td><td align="left" rowspan="3">8 years</td></tr><tr><td align="left"> Headache, nausea, dizziness, and limb pain</td><td align="left">✓</td><td align="left">✓</td><td align="left"></td></tr><tr><td align="left"> Osteosarcoma</td><td align="left"></td><td align="left">✓</td><td align="left">✓</td></tr></tbody></table></table-wrap></p><sec id="Sec1"><title>Adverse Reactions to Bisphosphonates</title><p>Bisphosphonates are stable derivatives of inorganic pyrophosphate and potent antiresorptive agents. They are widely prescribed and highly effective at limiting bone loss in osteoporosis. There have been a number of recent reviews on the safety and tolerability of bisphosphonates in osteoporosis [<xref ref-type="bibr" rid="CR7">7</xref>–<xref ref-type="bibr" rid="CR14">14</xref>] as well as in oncology, where higher doses are applied alongside anticancer agents to prevent skeletal complications and relieve bone pain [<xref ref-type="bibr" rid="CR12">12</xref>, <xref ref-type="bibr" rid="CR15">15</xref>].</p><p>All of the bisphosphonates discussed below have proven fracture efficacy in phase III trials [<xref ref-type="bibr" rid="CR3">3</xref>]. The phase III trials for alendronate were carried out in the mid-1990s by the Fracture Intervention Trial (FIT) investigators, who demonstrated efficacy against vertebral and nonvertebral fracture, including hip [<xref ref-type="bibr" rid="CR16">16</xref>, <xref ref-type="bibr" rid="CR17">17</xref>]. Alendronate was the first oral bisphosphonate and has 15 years of postapproval surveillance data [<xref ref-type="bibr" rid="CR18">18</xref>]. Similar fracture efficacy was found for oral risedronate, in the Vertebral Efficacy with Risedronate Therapy (VERT) trials [<xref ref-type="bibr" rid="CR19">19</xref>, <xref ref-type="bibr" rid="CR20">20</xref>] and the Hip Intervention Program (HIP) [<xref ref-type="bibr" rid="CR21">21</xref>]. Risedronate was launched at the end of the 1990s, and there are now 10 years of postapproval surveillance for this agent [<xref ref-type="bibr" rid="CR22">22</xref>]. Ibandronate has proven efficacy against vertebral fracture, as shown by the Oral Ibandronate Osteoporosis Vertebral Fracture Trial (BONE) [<xref ref-type="bibr" rid="CR23">23</xref>]; but pivotal trials have not shown nonvertebral or hip fracture risk reduction with this agent. Ibandronate is prescribed both as a monthly oral formulation, with 5 years of postapproval surveillance, and as a trimonthly intravenous (IV) formulation, with 4 years of postapproval surveillance [<xref ref-type="bibr" rid="CR24">24</xref>]. The most recently available bisphosphonate is zoledronic acid, for which there is evidence for the prevention of both vertebral and nonvertebral fractures, including those of the hip, from the Health Outcomes and Reduced Incidence with Zoledronic Acid Once Yearly (HORIZON) trial [<xref ref-type="bibr" rid="CR25">25</xref>]. Zoledronic acid has been prescribed as a once-yearly IV formulation since 2007 [<xref ref-type="bibr" rid="CR26">26</xref>], and there are 3 years of postapproval surveillance.</p><sec id="Sec2"><title>Gastrointestinal Effects</title><p>In their oral formulations, bisphosphonates may irritate the upper gastrointestinal (GI) mucosa since it is exposed to high concentrations at intake [<xref ref-type="bibr" rid="CR27">27</xref>]. Proper adherence to administration instructions can reduce frequency of GI effects [<xref ref-type="bibr" rid="CR27">27</xref>]. These include swallowing the drug with a large glass of water and remaining in the upright position for at least 30 min after intake (60 min for ibandronate).</p><p>Upper GI reactions are “common” with alendronate [<xref ref-type="bibr" rid="CR18">18</xref>]. They are the most frequently reported adverse reactions with risedronate in drug monitoring, though the regulatory authorities do not cite an increased frequency of upper GI reactions with risedronate [<xref ref-type="bibr" rid="CR22">22</xref>] and pooled analysis of RCTs found no evidence for an increase in risk compared with placebo [<xref ref-type="bibr" rid="CR28">28</xref>]. Regarding ibandronate, GI tolerability was initially thought to be of concern with the high dosages necessary for monthly oral administration (150 mg), but the investigators of the Monthly Oral Ibandronate in Ladies (MOBILE) trial found no apparent difference in GI adverse reactions between monthly and daily formulations [<xref ref-type="bibr" rid="CR29">29</xref>], with rates comparable to alendronate (about 22%). Upper GI effects are less frequent with weekly or monthly dosing than daily dosing for the same agent. Oral alendronate, risedronate, and ibandronate tablets also contain lactose, which causes abdominal discomfort in some patients but is rarely a severe problem.</p><p>The prevalence of esophageal reactions with alendronate is “common to rare” [<xref ref-type="bibr" rid="CR18">18</xref>]. Two conflicting reports have appeared on the association of the long-term use of oral bisphosphonates (up to 5 years) and incidence of esophageal cancer [<xref ref-type="bibr" rid="CR30">30</xref>, <xref ref-type="bibr" rid="CR31">31</xref>], both performed in the UK General Practice Research Database (GPRD). One of these reported a rate of 2/1,000 over 5 years (against a background rate of 1/1,000) [<xref ref-type="bibr" rid="CR30">30</xref>], while the other reported no association with esophageal or gastric cancer in users vs. nonusers [<xref ref-type="bibr" rid="CR31">31</xref>]. Another analysis of over 15,000 patients identified in RCTs or postapproval surveys found rates of esophageal cancer similar to the background rates in the population [<xref ref-type="bibr" rid="CR32">32</xref>], with an incidence of <1/1,000,000 patient-years of exposure. The Food and Drug Administration (FDA) currently recommends avoidance of oral bisphosphonates in patients with Barrett’s esophagus, a precursor of esophageal cancer, and has called for further research on possible risk factors [<xref ref-type="bibr" rid="CR33">33</xref>].</p></sec><sec id="Sec3"><title>Musculoskeletal Pain</title><p>Chronic bone, joint, and muscle pain has been associated with intake of both oral and IV bisphosphonates [<xref ref-type="bibr" rid="CR34">34</xref>] and was the subject of a warning from the FDA in 2008 [<xref ref-type="bibr" rid="CR35">35</xref>]. The pathological basis for the reaction remains unclear, though there may be a link with elevated parathyroid hormone (PTH) levels [<xref ref-type="bibr" rid="CR12">12</xref>]. Musculoskeletal pain is “common to rare” with alendronate [<xref ref-type="bibr" rid="CR18">18</xref>] and “common” with zoledronic acid [<xref ref-type="bibr" rid="CR26">26</xref>]. The FDA reports occurrences with alendronate, ibandronate, risedronate, and zoledronic acid, for which there was a (nonsignificant) difference vs. placebo [<xref ref-type="bibr" rid="CR35">35</xref>]. Musculoskeletal pain can occur at any time during the course of treatment, though there may be some overlap with acute-phase reactions (see below). It can be difficult to manage, especially if severe [<xref ref-type="bibr" rid="CR7">7</xref>, <xref ref-type="bibr" rid="CR8">8</xref>, <xref ref-type="bibr" rid="CR10">10</xref>]. Stopping treatment may give complete relief of symptoms, though there are cases of slow or incomplete resolution [<xref ref-type="bibr" rid="CR34">34</xref>].</p></sec><sec id="Sec4"><title>Acute-Phase Reactions</title><p>Acute-phase reactions have been reported with alendronate, ibandronate, and zoledronic acid [<xref ref-type="bibr" rid="CR9">9</xref>, <xref ref-type="bibr" rid="CR10">10</xref>, <xref ref-type="bibr" rid="CR12">12</xref>] and are characterized by low-grade fever, sometimes with rigors, and influenza-type symptoms, such as fatigue, malaise, headache, myalgia, arthralgia, and bone pain. They are attributed to altered activation and proliferation of γ-δ T cells [<xref ref-type="bibr" rid="CR36">36</xref>]. Onset may occur within 3 days of drug administration. The reaction is transient and generally resolves within 3 days [<xref ref-type="bibr" rid="CR14">14</xref>].</p><p>These are rated as “rare” to “uncommon” by the EMA [<xref ref-type="bibr" rid="CR18">18</xref>, <xref ref-type="bibr" rid="CR24">24</xref>, <xref ref-type="bibr" rid="CR26">26</xref>]; they appear to be more frequent with the IV bisphosphonates and are very rare following oral administration [<xref ref-type="bibr" rid="CR37">37</xref>]. In the Dosing Intravenous Administration (DIVA) study, flu-like illness (33 symptoms) was reported to occur with an incidence of 4.9% with IV ibandronate vs. 1.1% for oral ibandronate [<xref ref-type="bibr" rid="CR38">38</xref>]. They were also more common after the first injection of ibandronate than after subsequent administrations. Acute-phase symptoms have also been recorded after infusion of zoledronic acid (31.6% after first infusion vs. 6.2% in the placebo group, less so after second infusion) [<xref ref-type="bibr" rid="CR25">25</xref>, <xref ref-type="bibr" rid="CR26">26</xref>]. Acute-phase reactions are generally mild to moderate in intensity and are rarely the cause of withdrawal in RCTs. They can be treated symptomatically with paracetamol or other analgesics or antipyretics. The likelihood of experiencing this reaction can be reduced by administration of analgesics for a few days just after dosing [<xref ref-type="bibr" rid="CR10">10</xref>].</p></sec><sec id="Sec5"><title>Atrial Fibrillation</title><p>Concern over the possibility that bisphosphonates could induce atrial fibrillation [<xref ref-type="bibr" rid="CR39">39</xref>, <xref ref-type="bibr" rid="CR40">40</xref>] followed the observation of a small but significant increase in this event with zoledronic acid in HORIZON when reported as serious adverse events (50 events [1.3%] with zoledronic acid vs. 20 events [0.5%] with placebo, <italic>P</italic> < 0.001) [<xref ref-type="bibr" rid="CR25">25</xref>]. The treatment–placebo difference was no longer significant when the events were analyzed separately as atrial fibrillation or atrial flutter events, sick sinus syndrome, or arrhythmias, adjudicated or not. Similar findings were reported for alendronate in a post hoc analysis of the FIT trial [<xref ref-type="bibr" rid="CR41">41</xref>], in which there was a trend toward significance for atrial fibrillation (47 events [1.5%] with alendronate vs. 31 events [1.0%] with placebo, <italic>P</italic> = 0.07). Possible mechanisms for the modification of atrial conduction by bisphosphonates include intracellular electrolyte homeostasis and proinflammatory, profibrotic, and antiangiogenic effects [<xref ref-type="bibr" rid="CR40">40</xref>].</p><p>Observational studies have failed to detect an increase in atrial fibrillation with any of the bisphosphonates [<xref ref-type="bibr" rid="CR42">42</xref>, <xref ref-type="bibr" rid="CR43">43</xref>]. There is no RCT evidence that risedronate is associated with atrial fibrillation [<xref ref-type="bibr" rid="CR44">44</xref>], and postapproval surveillance indicates an incidence of <1/1,000,000 patient-years with this agent. Similarly, there was no increase in atrial fibrillation in any of the ibandronate trials. Finally, a recent systematic review and meta-analysis concluded that, though there are data linking bisphosphonate use to atrial fibrillation, the exact nature of the risk remains unclear because of the heterogeneity of the evidence and the lack of information on some of the agents [<xref ref-type="bibr" rid="CR45">45</xref>]. In 2008, the FDA concluded that no change in treatment should be made with respect to atrial fibrillation [<xref ref-type="bibr" rid="CR34">34</xref>].</p></sec><sec id="Sec6"><title>Atypical Subtrochanteric Fracture and Delayed Fracture Healing</title><p>The occurrence of atypical subtrochanteric fracture and delayed fracture healing with bisphosphonates has been the subject of a separate ESCEO Working Group meeting and review [<xref ref-type="bibr" rid="CR46">46</xref>] and a report from a Task Force of the American Society for Bone and Mineral Research [<xref ref-type="bibr" rid="CR47">47</xref>] and will be discussed only briefly here. Case reports draw attention to an association between subtrochanteric fractures and exposure to bisphosphonates, possibly related to long-term suppression of bone turnover [<xref ref-type="bibr" rid="CR48">48</xref>], as demonstrated by the absence of tetracycline labeling [<xref ref-type="bibr" rid="CR49">49</xref>]. Cortical bone appears to be the most affected, and patients with thick cortices may be more susceptible to an effect on fracture [<xref ref-type="bibr" rid="CR48">48</xref>]. Further supporting results for the deterioration of bone structural quality with long-term bisphosphonate use were presented at the annual meeting of the American Academy of Orthopedic Surgeons in March 2010 [<xref ref-type="bibr" rid="CR50">50</xref>, <xref ref-type="bibr" rid="CR51">51</xref>].</p><p>There is no RCT evidence for an increase in the risk of subtrochanteric fractures with any of the bisphosphonates [<xref ref-type="bibr" rid="CR52">52</xref>]. There have been case reports of atypical fracture or delayed fracture healing with long-term alendronate [<xref ref-type="bibr" rid="CR18">18</xref>, <xref ref-type="bibr" rid="CR53">53</xref>–<xref ref-type="bibr" rid="CR55">55</xref>], even though there are no quantitative differences in bone microarchitecture with alendronate [<xref ref-type="bibr" rid="CR56">56</xref>]. There is also evidence from case series with risedronate [<xref ref-type="bibr" rid="CR54">54</xref>, <xref ref-type="bibr" rid="CR55">55</xref>], for which postapproval surveys indicate <1/100,000 patient-years [<xref ref-type="bibr" rid="CR57">57</xref>]. There are three cases of atypical subtrochanteric fracture with ibandronate [<xref ref-type="bibr" rid="CR55">55</xref>], which occurred after 4 months to 1 year of ibandronate treatment preceded by 3–10 years of alendronate. There was no delayed fracture healing in the HORIZON trial (3.2% with zoledronic acid vs. 2.7% with placebo, nonsignificant) [<xref ref-type="bibr" rid="CR58">58</xref>].</p><p>The evidence for a link between increased atypical subtrochanteric fracture or delayed fracture healing and long-term bisphosphonate therapy [<xref ref-type="bibr" rid="CR46">46</xref>] generally comes from retrospective case series with small numbers of patients involved. The low frequency of atypical subtrochanteric fractures and the difficulties surrounding the definition of patients at risk considerably complicate the attribution of causality [<xref ref-type="bibr" rid="CR52">52</xref>]. Current hypotheses include a possible association of reduced bone turnover induced by the bisphosphonate and other risk factors, such as younger age at initiation or concomitant therapy with corticosteroids, proton pump inhibitors, or other antiresorptive treatments [<xref ref-type="bibr" rid="CR47">47</xref>, <xref ref-type="bibr" rid="CR52">52</xref>]. Further studies, including prospective controlled studies, meta-analyses, and nested case-control studies, are necessary to determine the role of other concomitant risk factors [<xref ref-type="bibr" rid="CR46">46</xref>].</p></sec><sec id="Sec7"><title>Osteonecrosis of the Jaw</title><p><italic>Osteonecrosis of the jaw</italic> is the appearance of exposed bone in the mandible, maxilla, or both that persists for at least 8 weeks in the absence of radiotherapy or jaw metastases. The condition is known to affect patients receiving IV bisphosphonate for metastatic disease [<xref ref-type="bibr" rid="CR59">59</xref>]. Patients in oncology generally receive much larger doses than those with osteoporosis. Assessment of causality is very difficult, though there is a possible role of inflammation and infection [<xref ref-type="bibr" rid="CR60">60</xref>, <xref ref-type="bibr" rid="CR61">61</xref>].</p><p>The association of osteonecrosis of the jaw and bisphosphonate treatment for osteoporosis has already been the subject of a separate ESCEO Working Group paper [<xref ref-type="bibr" rid="CR61">61</xref>]. Osteonecrosis of the jaw is very rare with oral bisphosphonates in the management of osteoporosis, and current estimates of incidence stand at around 1/38,000 patient-years of treatment [<xref ref-type="bibr" rid="CR61">61</xref>–<xref ref-type="bibr" rid="CR64">64</xref>]. Data from the GPRD and The Health Improvement Network (THIN) suggest that the annual incidence of all osteonecrosis is 2 to 3/100,000, independently of bisphosphonate use [<xref ref-type="bibr" rid="CR65">65</xref>]. The lower doses of bisphosphonates used in osteoporosis, in comparison with oncology, appear to be safe [<xref ref-type="bibr" rid="CR66">66</xref>].</p><p>There have been no cases of osteonecrosis of the jaw reported with risedronate in RCTs, and the postapproval reporting rate is <2/100,000 patient-years, with 434 reports in which 30–35% of patients had taken the drug for <1 year (S. Boonen, personal communication). There were two cases of osteonecrosis of the jaw in the HORIZON trial, one in the zoledronic acid group and one in the placebo group [<xref ref-type="bibr" rid="CR67">67</xref>]. The rate in the zoledronic acid-treated osteoporotic population is currently estimated at 0.9/100,000 patient-years of treatment. For ibandronate, the rate is 0.9/1,000,000 patients exposed in osteoporosis vs. 2.3/100,000 patients exposed in oncology (R. Schimmer, personal communication).</p><p>Some strategies for prevention of osteonecrosis of the jaw have been proposed in oncology, including good oral hygiene, completion of dental work prior to initiation of treatment, and discontinuation of treatment for 3 months in the event that a dental procedure is necessary [<xref ref-type="bibr" rid="CR61">61</xref>, <xref ref-type="bibr" rid="CR66">66</xref>]. Any intervention at the jaw in patients using bisphosphonates for osteoporosis should include antibiotic therapy for 3 weeks. Management of osteonecrosis of the jaw involves treatment of secondary infections, analgesia, and surgical removal of necrotic debris [<xref ref-type="bibr" rid="CR63">63</xref>, <xref ref-type="bibr" rid="CR68">68</xref>].</p></sec><sec id="Sec8"><title>Hypersensitivity Reactions</title><p>Cutaneous adverse reactions are the subject of a separate ESCEO report [<xref ref-type="bibr" rid="CR69">69</xref>]. Cases of Stevens-Johnson syndrome and toxic epidermal necrolysis have been reported for all the bisphosphonates [<xref ref-type="bibr" rid="CR13">13</xref>, <xref ref-type="bibr" rid="CR69">69</xref>], though these remain very rare (<1/10,000 patients). These reactions have a strong temporality and appear within 5–10 days of initiation of treatment. Unsurprisingly for a very rare reaction, there are more case reports for the agents that have been in clinical use for the longest. The prognosis is good if the reaction is recognized early and managed appropriately [<xref ref-type="bibr" rid="CR69">69</xref>].</p></sec><sec id="Sec9"><title>Renal Safety</title><p>The use of IV bisphosphonates in oncology has been associated with rare cases of deterioration of renal function due to the high doses administered over a short period of time [<xref ref-type="bibr" rid="CR70">70</xref>]. Analysis of the HORIZON trial demonstrated the renal safety of IV zoledronic acid in osteoporosis [<xref ref-type="bibr" rid="CR70">70</xref>], with no long-term change in renal function in terms of creatinine clearance. There were transient rises in serum creatinine in 1.8% of treated patients vs. 0.8% of the placebo group, but all cases were completely resolved. The FDA reports 24 cases in postapproval (i.e., very rare), while the EMA describes renal impairment as “uncommon” and advises precaution in at-risk patients [<xref ref-type="bibr" rid="CR26">26</xref>]. Further support for the good renal safety of IV bisphosphonates in osteoporosis comes from a pooled analysis of the renal tolerability of ibandronate in four RCTs. No relevant differences in parameters of renal toxicity were found between the IV formulation and oral formulations (incidence of increase in serum creatinine from baseline of ≥ 0.5 mg/dl of about 0.4%). Regardless of dose, creatinine clearance remained at baseline levels and was comparable to placebo [<xref ref-type="bibr" rid="CR71">71</xref>].</p></sec></sec><sec id="Sec10"><title>Adverse Reactions to Denosumab</title><p>The efficacy of denosumab in the prevention of fracture in postmenopausal osteoporosis was demonstrated vs. placebo in the Fracture Reduction Evaluation of Denosumab in Osteoporosis Every 6 Months (FREEDOM) trial [<xref ref-type="bibr" rid="CR72">72</xref>]. Denosumab is a fully human monoclonal antibody against the RANK ligand and a potent inhibitor of osteoclast-mediated bone resorption. Denosumab was approved for clinical use very recently, so the only evidence for safety and adverse reactions in osteoporosis is based on phase III studies [<xref ref-type="bibr" rid="CR72">72</xref>, <xref ref-type="bibr" rid="CR73">73</xref>] and regulatory documents [<xref ref-type="bibr" rid="CR74">74</xref>]. Case reports with the agent are rare, and there are not yet any pharmacovigilance data.</p><p>There were no significant differences between denosumab and placebo in terms of the total incidence of adverse events in FREEDOM or in the Denosumab Hormone Ablation Bone Loss Trial (HALT) [<xref ref-type="bibr" rid="CR72">72</xref>, <xref ref-type="bibr" rid="CR73">73</xref>]. In FREEDOM, adverse events occurring with an incidence of 2% or greater and a significant difference from placebo (<italic>P</italic> ≤ 0.05) were eczema and flatulence [<xref ref-type="bibr" rid="CR72">72</xref>]. Serious adverse events occurring with an incidence of 0.1% or greater and a significant difference from placebo (<italic>P</italic> ≤ 0.01) included cellulitis and concussion.</p><sec id="Sec11"><title>Infections</title><p>Data from RCTs indicate a higher rate of serious infection with denosumab than placebo (4.4% vs. 3.6%, respectively) [<xref ref-type="bibr" rid="CR74">74</xref>–<xref ref-type="bibr" rid="CR76">76</xref>], including infection of the skin, the ear, the GI tract, and the urinary tract. These can be related to bacteria or unspecified pathogens. This is biologically plausible since RANKL is expressed on activated T and B lymphocytes, which, in the lymph nodes, are responsible for recognition of foreign antigens [<xref ref-type="bibr" rid="CR77">77</xref>]. RANKL inhibition with denosumab may therefore play some role in arresting these processes, though further research is necessary. Infection of the urinary tract is rated as “common” by the FDA [<xref ref-type="bibr" rid="CR74">74</xref>].</p><p>The cutaneous effects observed in the denosumab RCTs (eczema and cellulitis) were generally localized infections in the lower extremities and often occurred in patients with risk factors such as skin wounds or peripheral vascular and venous stasis disorders. The clinical course generally consisted of full recovery with no recurrence, though cutaneous effects were linked to one death in FREEDOM (one case of fatal cellulitis). These cutaneous effects do not appear to be a local reaction to injection. It is too early to determine causality, though an increase in cutaneous effects with denosumab vs. placebo remained when data from FREEDOM and HALT were combined (D. Felsenberg, personal communication). The rate can be estimated as “very rare” (<1/10,000 patients). The risk should be monitored.</p></sec><sec id="Sec12"><title>Osteonecrosis of the Jaw</title><p>Given the observations with the bisphosphonates, it might be expected that a potent antiresorptive agent such as denosumab could also pose a potential risk for osteonecrosis of the jaw [<xref ref-type="bibr" rid="CR78">78</xref>]. There were no cases of osteonecrosis of the jaw in the phase III studies of denosumab in osteoporosis. There is one case report of osteonecrosis of the jaw in a male patient receiving denosumab in a trial in oncology [<xref ref-type="bibr" rid="CR79">79</xref>]. Moreover, the reaction has been reported in 34 subjects receiving denosumab for the management of metastatic disease [<xref ref-type="bibr" rid="CR80">80</xref>]. The rate can be estimated at around 2/100, but the true risk is unknown and should be monitored. It should be noted that in this comparative trial the rate of occurrence of osteonecrosis of the jaw was 1.4% in zoledronic acid-treated patients.</p></sec><sec id="Sec13"><title>Cancer</title><p>Preregistration RCTs with denosumab indicate slightly higher rates of malignancy in osteoporotic women (4.0% with denosumab vs. 3.3% with placebo) [<xref ref-type="bibr" rid="CR74">74</xref>], principally cancer of the pancreas, the GI and reproductive tracts, and the breast. Breast cancer was the most common adverse event that led to discontinuation in clinical trials (0.5% denosumab vs. 0.3% placebo). The mechanisms underlying these processes remain unclear, particularly in the absence of an appropriate animal model as denosumab is not active in rodents. The rate can be estimated as “very rare,” though further monitoring is necessary. A postmarketing survey of more than 4,500 women has been launched in postmenopausal women receiving the agent for up to 10 years.</p></sec></sec><sec id="Sec14"><title>Adverse Reactions to SERMs</title><p>SERMs partially mimic the effect of estrogens on bone and the cardiovascular system and have estrogen antagonist properties in the endometrium and breast. The efficacy of the SERM raloxifene in the prevention of osteoporotic fracture was extensively studied in the Multiple Outcomes of Raloxifene Evaluation (MORE) [<xref ref-type="bibr" rid="CR81">81</xref>] and Continuing Outcomes Relevant to Evista (CORE) [<xref ref-type="bibr" rid="CR82">82</xref>]. Its effects on breast cancer and other outcomes were explored in the Study of Tamoxifen and Raloxifene (STAR) [<xref ref-type="bibr" rid="CR83">83</xref>] and the Raloxifene Use for the Heart (RUTH) trial [<xref ref-type="bibr" rid="CR84">84</xref>, <xref ref-type="bibr" rid="CR85">85</xref>]. Raloxifene was launched in the 1990s and has 13 years of postapproval surveillance [<xref ref-type="bibr" rid="CR86">86</xref>].</p><p>There are two newcomers to the class. The SERMs bazedoxifene and lasofoxifene were registered by the EMA in 2009, but only basedoxifene is currently available for clinical use [<xref ref-type="bibr" rid="CR87">87</xref>–<xref ref-type="bibr" rid="CR89">89</xref>]. The efficacy of bazedoxifene at preventing osteoporotic fracture over 3 years has been investigated vs. placebo [<xref ref-type="bibr" rid="CR90">90</xref>], and its endometrial, ovarian, and breast safety profiles have been evaluated in an RCT in postmenopausal osteoporotic women, also over 3 years [<xref ref-type="bibr" rid="CR91">91</xref>]. Lasofoxifene has been studied in the 5-year Postmenopausal Evaluation and Risk Reduction with Lasofoxifene (PEARL) trial, which reported efficacy at increasing bone mineral density and reducing radiographic vertebral fracture [<xref ref-type="bibr" rid="CR92">92</xref>, <xref ref-type="bibr" rid="CR93">93</xref>].</p><sec id="Sec15"><title>Hot Flushes and Leg Cramps</title><p>The most common adverse reactions of the SERMs are linked to their vasomotor effects. The incidence of hot flushes and leg cramps was significantly increased in the raloxifene trials [<xref ref-type="bibr" rid="CR94">94</xref>, <xref ref-type="bibr" rid="CR95">95</xref>]. The mechanisms behind these phenomena are believed to be related to the competing effect of the SERM on the relevant estrogen receptor. In a pooled analysis of nearly 900 women participating in phase III trials, the relative risk of hot flushes has been estimated as 1.32 vs. placebo [<xref ref-type="bibr" rid="CR94">94</xref>], with no apparent impact on the natural course of incident hot flushes. Regarding temporality, an 8-year analysis indicated that the increase in risk was greatest within the first 6 months of initiation of raloxifene [<xref ref-type="bibr" rid="CR95">95</xref>]. While hot flushes and leg cramps were more common in those receiving raloxifene over 8 years than placebo, this was almost entirely explained by the increased incidence of hot flushes with raloxifene in the first 5 years. This observation may be due to the withdrawal of those with severe hot flushes or leg cramps from the trial or to an effect of aging of the population, which effectively reduces the risk for hot flushes. These effects are noted as “very common” for hot flushes and “common” for leg cramps for raloxifene by the EMA [<xref ref-type="bibr" rid="CR86">86</xref>]. Similar rates of hot flushes and leg cramps are reported for bazedoxifene and lasofoxifene [<xref ref-type="bibr" rid="CR87">87</xref>, <xref ref-type="bibr" rid="CR88">88</xref>, <xref ref-type="bibr" rid="CR90">90</xref>, <xref ref-type="bibr" rid="CR92">92</xref>, <xref ref-type="bibr" rid="CR96">96</xref>].</p></sec><sec id="Sec16"><title>Venous Thromboembolism</title><p>Like hormone replacement therapy, treatment with SERMs is associated with an increased risk for venous thromboembolism, including deep vein thrombosis and pulmonary embolism [<xref ref-type="bibr" rid="CR97">97</xref>]. The frequency of venous thromboembolism was increased in phase III trials with raloxifene, with a relative risk of about 1.7 vs. placebo in the combined analysis of MORE and CORE [<xref ref-type="bibr" rid="CR85">85</xref>, <xref ref-type="bibr" rid="CR95">95</xref>, <xref ref-type="bibr" rid="CR98">98</xref>]. A large proportion of cases (69%) had some contraindication to raloxifene (e.g., immobilization or hypercoagulability) [<xref ref-type="bibr" rid="CR99">99</xref>]. The incidence was reduced in the long-term trial CORE [<xref ref-type="bibr" rid="CR95">95</xref>], though this may have been linked to discontinuation due to these adverse reactions and because these events occurred at the beginning of treatment. The EMA notes this adverse reaction as “uncommon” with raloxifene [<xref ref-type="bibr" rid="CR86">86</xref>].</p><p>There are fewer data for bazedoxifene and lasofoxifene. There was a higher incidence of deep vein thrombosis in the RCTs with bazedoxifene (0.7% with bazedoxifene 20 mg/day vs. 0.3% with placebo) [<xref ref-type="bibr" rid="CR90">90</xref>, <xref ref-type="bibr" rid="CR96">96</xref>]. Venous thromboembolic events constituted an adjudicated end point in the PEARL trial [<xref ref-type="bibr" rid="CR92">92</xref>], in which lasofoxifene more than doubled the relative risk, though the absolute risk was very small (2.9 venous thromboembolic events per 1,000 patient-years with lasofoxifene 0.5 mg/day vs. 1.4 events with placebo and 0.7 pulmonary embolism events per 1,000 patient-years vs. 0.2 events with placebo) [<xref ref-type="bibr" rid="CR92">92</xref>]. The EMA reports deep vein thrombosis as “uncommon” for both lasofoxifene and bazedoxifene [<xref ref-type="bibr" rid="CR87">87</xref>, <xref ref-type="bibr" rid="CR88">88</xref>].</p></sec><sec id="Sec17"><title>Cardiovascular Events and Stroke</title><p>An increase in fatal stroke with raloxifene was reported in RUTH (hazard ratio = 1.49, 95% confidence interval [CI] 1.00–2.24, with an absolute increase in risk of 0.7 per 1,000 patient-years) [<xref ref-type="bibr" rid="CR85">85</xref>], though secondary analysis of the trial indicated that the risk of stroke varied according to smoking status [<xref ref-type="bibr" rid="CR100">100</xref>]. Analysis of the MORE and CORE data set has demonstrated that raloxifene has no significant beneficial or harmful impact on cardiovascular events (i.e., coronary or cerebrovascular) [<xref ref-type="bibr" rid="CR101">101</xref>]. This observation is also supported by the results of the RUTH study, in which participants were at higher cardiovascular risk [<xref ref-type="bibr" rid="CR85">85</xref>] and in which there was no significant difference in total strokes or death from any cause. Moreover, there is evidence from animal experiments that high doses of raloxifene may be associated with some neuroprotective effects [<xref ref-type="bibr" rid="CR102">102</xref>]. In the MORE study, higher doses of raloxifene (120 mg/day) were associated with some improvement in the results of cognitive tests [<xref ref-type="bibr" rid="CR103">103</xref>]. Regarding the other SERMS, there was a moderate, nonsignificant increase in fatal stroke with lasofoxifene in the PEARL study [<xref ref-type="bibr" rid="CR92">92</xref>] and no difference from placebo for bazedoxifene in the 3-year phase III trial [<xref ref-type="bibr" rid="CR90">90</xref>, <xref ref-type="bibr" rid="CR96">96</xref>]. The EMA rates the incidence of stroke (arterial thromboembolic disorders) as “very rare” [<xref ref-type="bibr" rid="CR86">86</xref>].</p></sec><sec id="Sec18"><title>Gynecological Safety</title><p>Raloxifene and bazedoxifene have no impact on endometrial thickness [<xref ref-type="bibr" rid="CR96">96</xref>, <xref ref-type="bibr" rid="CR104">104</xref>]. There was no significant difference in the incidence of uterine cancer, endometrial hyperplasia, ovarian cancer, or postmenopausal bleeding between raloxifene and placebo in the analysis of MORE and CORE [<xref ref-type="bibr" rid="CR95">95</xref>]. There was a greater incidence of uterine polyps, though all of these were benign and not associated with endometrial cancer. Uterine polyps were also more common with lasofoxifene than placebo in the PEARL study [<xref ref-type="bibr" rid="CR92">92</xref>]. The rate of these events can be estimated as “very rare” (<1/10,000 patients).</p></sec></sec><sec id="Sec19"><title>Adverse Reactions to Strontium Ranelate</title><p>Strontium ranelate is an orally active agent which decreases bone resorption and increases bone formation markers, with a net result of improved microarchitecture [<xref ref-type="bibr" rid="CR105">105</xref>]. The efficacy of strontium ranelate in the prevention of vertebral and nonvertebral fractures, including hip fracture in a subgroup at risk of hip fracture, has been demonstrated in postmenopausal osteoporotic women over 3 years in the Spinal Osteoporosis Therapeutic intervention (SOTI) [<xref ref-type="bibr" rid="CR106">106</xref>] and up to 5 years in the Treatment of Peripheral Osteoporosis (TROPOS) trial [<xref ref-type="bibr" rid="CR107">107</xref>]. There were no significant safety issues in either of these phase III trials. Strontium ranelate has been in clinical use since 2004 and has 6 years of postapproval surveillance.</p><sec id="Sec20"><title>Venous Thromboembolism</title><p>There was no increase in venous thromboembolism with strontium ranelate in the SOTI and TROPOS populations. However, when the two trial populations were pooled, the annual incidence of venous thromboembolism over 5 years was 0.9% with strontium ranelate vs. 0.6% with placebo (relative risk = 1.4, 95% CI 1.0–2.0) [<xref ref-type="bibr" rid="CR108">108</xref>]. While these rates of venous thromboembolism are similar to those in the age-matched general population [<xref ref-type="bibr" rid="CR109">109</xref>–<xref ref-type="bibr" rid="CR111">111</xref>], they required further investigation. A retrospective study in the GPRD database identified 11,546 untreated osteoporotic women, 20,084 osteoporotic women treated with alendronate, 2,408 osteoporotic women treated with strontium ranelate, and 115,009 nonosteoporotic women [<xref ref-type="bibr" rid="CR112">112</xref>]. The risk for venous thromboembolism in this population-based sample was significantly increased in the untreated osteoporotic patients compared with their nonosteoporotic counterparts (hazard ratio = 1.43, 95% CI 1.10-1.86; <italic>P</italic> = 0.007, age-adjusted model). The authors attributed this increase in risk to the reduced mobility associated with osteoporosis. There was no difference between the rates of venous thromboembolism in untreated and treated osteoporotic patients, whatever their treatment (strontium ranelate or alendronate). Similar findings have been reported from two other observational studies, so the postmarketing data are reassuring [<xref ref-type="bibr" rid="CR113">113</xref>, <xref ref-type="bibr" rid="CR114">114</xref>].</p></sec><sec id="Sec21"><title>Hypersensitivity Reactions</title><p>Strontium ranelate has been associated with rare cases of the hypersensitivity drug reaction with eosinophilia and systemic symptoms (DRESS). The incidence of this adverse reaction is extremely low, estimated at 1/54,000 patient-years of treatment. This has been discussed in a recent ESCEO Working Group review [<xref ref-type="bibr" rid="CR69">69</xref>]. Early recognition and proper management by stopping the agent are mandatory and improve prognosis.</p></sec></sec><sec id="Sec22"><title>Adverse Reactions to Teriparatide or PTH(1–84)</title><p>Teriparatide, the 1–34 N-terminal fragment of human PTH, has bone-forming properties [<xref ref-type="bibr" rid="CR115">115</xref>]. It has been demonstrated to effectively reduce vertebral and nonvertebral fractures over 21 months in postmenopausal osteoporotic women [<xref ref-type="bibr" rid="CR116">116</xref>]. Its use is limited to 24 months of treatment [<xref ref-type="bibr" rid="CR115">115</xref>, <xref ref-type="bibr" rid="CR117">117</xref>]. Teriparatide has been in clinical use since 2002 and has 8 years of postapproval surveillance. PTH(1–84) was approved for vertebral fracture prevention in 2006 and is available in some countries [<xref ref-type="bibr" rid="CR118">118</xref>].</p><sec id="Sec23"><title>Nervous System Disorders</title><p>In the placebo-controlled trials of teriparatide and PTH(1–84), there were a number of minor adverse reactions, including headache, nausea, and dizziness, which are rated as “common” to “very common” by the EMA. Teriparatide also appears to be associated with an increase in limb pain [<xref ref-type="bibr" rid="CR117">117</xref>], which is noted as “very common” by the EMA. In a study exploring the efficacy of combination teriparatide and raloxifene in osteoporosis, muscle spasm was the only adverse reaction reported to be related to treatment with teriparatide [<xref ref-type="bibr" rid="CR119">119</xref>].</p></sec><sec id="Sec24"><title>Osteosarcoma</title><p>There were no cases of osteosarcoma in the RCTs with teriparatide or PTH(1–84), though teriparatide has been reported to induce osteosarcoma in experimental animals [<xref ref-type="bibr" rid="CR120">120</xref>, <xref ref-type="bibr" rid="CR121">121</xref>]. There is one case report of osteosarcoma with teriparatide in a 70-year-old postmenopausal woman with a complex medical history [<xref ref-type="bibr" rid="CR122">122</xref>]. This reaction is rated as extremely rare (1/100,000 patients) and should be considered against the background incidence in the general population, which is around 0.4/100,000 per year in a population aged over 60 years [<xref ref-type="bibr" rid="CR8">8</xref>, <xref ref-type="bibr" rid="CR122">122</xref>]. However, this has led to an FDA warning [<xref ref-type="bibr" rid="CR123">123</xref>], including a statement that patients who have skeletal metastases, Paget disease, or open epiphyses should not be prescribed teriparatide.</p></sec></sec><sec id="Sec25"><title>Drug–Drug Interactions in Osteoporosis</title><p>Drug–drug interactions are rare in the management of osteoporosis and discussed only briefly here. Coadministration of oral bisphosphonates and calcium or acid-suppressant medication, or indeed any other oral medications containing divalent cations, is known to interfere with absorption of the bisphosphonate. Calcium supplementation should therefore be distanced from bisphosphonate intake. An apparent increase in the risk of fracture has been reported in individuals receiving acid-suppressant medication (proton pump inhibitors) but not with histamine H<sub>2</sub>-receptor antagonists [<xref ref-type="bibr" rid="CR124">124</xref>]. This increase in risk remained in patients receiving acid-suppressant medication in combination with bisphosphonates vs. bisphosphonate alone. Given the nature of the risk, this issue requires further exploration.</p><p>Caution is also recommended with oral bisphosphonates and the concomitant use of agents that irritate the gastric mucosa (e.g., nonsteroidal anti-inflammatory drugs) due to the GI effects of the bisphosphonate. There does not appear to be cause for concern over drug–drug interactions for ibandronate [<xref ref-type="bibr" rid="CR125">125</xref>]. Renal damage due to bisphosphonates could be exacerbated by nonsteroidal anti-inflammatory agents, aminoglycoside antibiotics, antiretroviral therapies, or diuretics [<xref ref-type="bibr" rid="CR126">126</xref>, <xref ref-type="bibr" rid="CR127">127</xref>]. Thus, care should be taken to administer IV bisphosphonates to only fully hydrated patients. Regarding zoledronic acid, renal function should be monitored and drugs affecting cardiac arrhythmias should be used with caution. One case of transient elevated liver enzymes has been reported with zoledronic acid and ibuprofen. There are not yet any reported drug–drug interactions of concern for denosumab.</p><p>Cholestyramine and colestipol may also affect the absorption and enterohepatic recycling of raloxifene. Levothyroxine may decrease the absorption of the drug.</p><p>There are few drug–drug interactions with strontium ranelate. There are possible interactions with quinolones, tetracycline antibiotics, and aluminum and magnesium hydroxides; and the administration of strontium ranelate should be separated from intake of dietary calcium by 2 h. There is a possible interaction between teriparatide and other treatments that affect serum calcium, though no interaction has been detected with digoxin or thiazides.</p></sec><sec id="Sec26"><title>Discussion and Conclusion</title><p>This review indicates that the most serious adverse reactions are very rare in the management of postmenopausal osteoporosis and that the osteoporosis treatments are generally free of serious drug–drug interactions. We have reviewed the most commonly used osteoporosis treatments in Europe as well as new agents in the field.</p><p>Causality is notoriously difficult to attribute for rare adverse drug reactions, e.g., osteonecrosis of the jaw and atypical subtrochanteric fracture [<xref ref-type="bibr" rid="CR4">4</xref>, <xref ref-type="bibr" rid="CR5">5</xref>, <xref ref-type="bibr" rid="CR128">128</xref>]. Such decisions are also fraught with interrater differences in opinion since studies repeatedly show low agreement between experts regarding causality when they assess the same case reports [<xref ref-type="bibr" rid="CR129">129</xref>]. Causality can only be definitively established if a certain number of criteria are met: (1) a plausible temporality in relation to administration; (2) a reasonable mechanism in view of the agent concerned; (3) a frequency that differs from the background rate of the event in the population; and (4) evidence from dechallenge and rechallenge (though this is clearly not an option in the case of life-threatening events). One example of the difficulties in establishing causality in osteoporosis is osteosarcoma with teriparatide, which appears to occur at rates similar to the background rate in the elderly population. While the best evidence for causality should ideally come from RCT data, this is virtually impossible for the rare events. For instance, there were only two reports of bisphosphonate-related osteonecrosis of the jaw in RCTs, and one of those was in the placebo group.</p><p>The monitoring of risk and pharmacovigilance are therefore central features of any drug safety program. Improvements in pharmacovigilance should increase the knowledge of adverse reactions via intensive monitoring and database studies (such as those performed on venous thromboembolism and osteonecrosis of the jaw in the GPRD) and the use of algorithms for assessing the probability of an adverse reaction [<xref ref-type="bibr" rid="CR130">130</xref>, <xref ref-type="bibr" rid="CR131">131</xref>]. Indeed, postapproval studies are necessary to make objective decisions regarding rare serious adverse reactions. As shown in Table <xref rid="Tab1" ref-type="table">1</xref>, the rare adverse reactions are generally only reported in pharmacovigilance or as case series and often only appear with widespread clinical use of the agent concerned. Regarding case reports, the evidence base is less solid, partly because they may be biased by opinions of the reporter and partly because they do not necessarily give an accurate assessment of the risk due to underreporting or selective reporting [<xref ref-type="bibr" rid="CR130">130</xref>].</p><p>Table <xref rid="Tab2" ref-type="table">2</xref> synthesizes and classifies the adverse drug reactions to osteoporosis treatments in terms of their prevalence, the strength and consistency of the association, dose–response and temporality, and biological plausibility as reported in this review. For the sake of simplicity, we have assumed class effects for the bisphosphonates and SERMs. The more common adverse reactions, e.g., GI effects with oral bisphosphonates and hot flushes with SERMs, are well documented and generally associated with higher values for strength and consistency of the association, dose–response, temporality, and biological plausibility. On the other hand, the rarer adverse reactions have no strong evidence on any of these points and yet are serious enough to require further monitoring. For example, osteonecrosis of the jaw and atypical subtrochanteric fracture have been clearly documented as issues of concern by regulatory authorities for the antiresorptive agents; however, the low incidence of the reactions and the limited capacity to explore it using conventional evidence criteria, such as RCTs, make it difficult to be categorical about the association.<table-wrap id="Tab2"><label>Table 2</label><caption><p>Adverse reactions to treatments in osteoporosis</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left"></th><th align="left">Prevalence</th><th align="left">Strength of association</th><th align="left">Consistency of association</th><th align="left">Dose–response</th><th align="left">Temporality</th><th align="left">Biological plausibility</th></tr></thead><tbody><tr><td align="left" colspan="7">Bisphosphonates</td></tr><tr><td align="left"> GI effects (oral formulations)</td><td align="left">Common (≥1/100)</td><td align="left">++</td><td align="left">++</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Musculoskeletal pain</td><td align="left">Common (≥1/100)</td><td align="left">+</td><td align="left">+</td><td align="left">−</td><td align="left">+</td><td align="left">−</td></tr><tr><td align="left"> Acute-phase reactions (IV formulations)</td><td align="left">Common (≥1/100)</td><td align="left">++</td><td align="left">++</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Atrial fibrillation</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td></tr><tr><td align="left"> Atypical fracture/delayed fracture healing</td><td align="left">Very rare (<1/10,000)</td><td align="left">±</td><td align="left">−</td><td align="left">−</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Osteonecrosis of the jaw</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">+</td></tr><tr><td align="left"> Hypersensitivity reactions</td><td align="left">Very rare (<1/10,000)</td><td align="left">+</td><td align="left">+</td><td align="left">−</td><td align="left">+</td><td align="left">−</td></tr><tr><td align="left"> Renal impairment</td><td align="left">Very rare (<1/10,000)</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left" colspan="7">Denosumab</td></tr><tr><td align="left"> Severe infection</td><td align="left">Common (≥1/100)</td><td align="left">+</td><td align="left">+</td><td align="left">−</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Osteonecrosis of the jaw</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">+</td></tr><tr><td align="left"> Cancer</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td></tr><tr><td align="left" colspan="7">SERMs</td></tr><tr><td align="left"> Hot flushes</td><td align="left">Very common (>1/10)</td><td align="left">++</td><td align="left">++</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Leg cramps</td><td align="left">Common (≥1/100)</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Venous thromboembolism</td><td align="left">Uncommon (≥1/1,000 to <1/100)</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Stroke</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td></tr><tr><td align="left"> Endometrial effects</td><td align="left">Very rare (<1/10,000)</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left" colspan="7">Strontium ranelate</td></tr><tr><td align="left"> Venous thromboembolism</td><td align="left">Very rare (<1/10,000)</td><td align="left">+</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td></tr><tr><td align="left"> Hypersensitivity reactions</td><td align="left">Very rare (<1/10,000)</td><td align="left">+</td><td align="left">−</td><td align="left">−</td><td align="left">+</td><td align="left">−</td></tr><tr><td align="left" colspan="7">Teriparatide or PTH(1–84)</td></tr><tr><td align="left"> Headache, nausea, dizziness, and limb pain</td><td align="left">Common (≥1/100)</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td><td align="left">+</td></tr><tr><td align="left"> Osteosarcoma</td><td align="left">Very rare (<1/10,000)</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">−</td><td align="left">±</td></tr></tbody></table><table-wrap-foot><p><italic>++</italic> strong evidence, <italic>+</italic> evidence, <italic>±</italic> mixed evidence, − no evidence</p></table-wrap-foot></table-wrap></p><p>A good management strategy should always weigh the risk of adverse reactions against the benefits of treatment, i.e., the prevention of osteoporotic fracture. We should recall that all the osteoporosis treatments covered in this review have proven efficacy at reducing vertebral fracture in women with postmenopausal osteoporosis, and some have evidence for nonvertebral and hip fractures. It should be noted that perhaps the biggest risk associated with adverse drug reactions might be that a patient’s fear of an adverse reaction would prevent him or her from taking the osteoporosis medication in the appropriate manner, thereby increasing the risk of fracture. In this context, great care should be applied in the provision of information on adverse drug reactions to patients, particularly in light of studies that show that patients significantly overestimate the likelihood of an adverse reaction occurring [<xref ref-type="bibr" rid="CR132">132</xref>, <xref ref-type="bibr" rid="CR133">133</xref>].</p><p>In conclusion, osteoporosis treatments are generally safe and well tolerated. 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GE, Glaxo, Lilly, MSD, Novartis, Nycomed, Roche, Servier, Teva, Warner/Chilcott, and Wyeth/Pfizer.</p><p>Kaufman has received speaker and/or consultant fees and/or research support from Amgen, Daiichi-Sankyo, Glaxo SmithKline, Merck Sharp & Dohme, Novartis, Nycomed, Servier, and Roche.</p><p>Kanis has received consulting and lecture fees, on paid advisory boards, and/or grant support from Abiogen, Italy; Amgen, USA, Switzerland and Belgium; Bayer, Germany; Besins-Iscovesco, France; Biosintetica, Brazil; Boehringer Ingelheim, UK; Celtrix, USA; D3A, France; European Federation of Pharmaceutical Industry and Associations, (EFPIA) Brussels; Gador, Argentina; General Electric, USA; GSK, UK, USA; Hologic, Belgium and USA; Kissei, Japan; Leiras, Finland; Leo Pharma, Denmark; Lilly, USA, Canada, Japan, Australia and UK; Merck Research Labs, USA; Merlin Ventures, UK; MRL, China; Novartis, Switzerland and USA; Novo Nordisk, Denmark; Nycomed, Norway; Ono, UK and Japan; Organon, Holland; Parke-Davis, USA; Pfizer USA; Pharmexa, Denmark; Procter and Gamble, UK, USA; ProStrakan, UK; Roche, Germany, Australia, Switzerland, USA; Rotta Research, Italy; Sanofi-Aventis, USA; Schering, Germany and Finland; Servier, France and UK; Shire, UK; Solvay, France and Germany; Strathmann, Germany; Tarsa Therapeutics, US; Tethys, USA; Teijin, Japan; Teva, Israel; UBS, Belgium; Unigene, USA; Warburg-Pincus, UK; Warner-Lambert, USA; Wyeth, USA.</p><p>Cooper has received consulting fees from Alliance for Better Bone Health, Lilly, Merck Sharp and Dohme, GlaxoSmithKline, Roche, Novartis, Amgen, and Servier.</p></fn></fn-group></back></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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