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Comparative Study
English Abstract
Journal Article
Review
[Therapy of osteoporosis: bisphosphonates, SERM's, teriparatide and strontium].
Zeitschrift Für Rheumatologie 2003 December
The therapy of osteoporosis is mostly based upon the use of drugs which inhibit bone resorption. Among these, the bisphosphonate family is the best known and mostly used by clinicians. Both second and third generation bisphosphonates, like alendronate and risedronate, are now available as weekly tablets which have facilitated the patient compliance to treatment together with a decreased occurrence of gastrointestinal side effects. These compounds are used efficiently to treat postmenopausal osteoporosis and osteoporosis of men as well. Their use did provide good evidence of increased bone mineral density (BMD) and a reduction in fracture rates. The use of intravenous bisphosphonates such as Zoledronate, Ibandronate and Pamidronate remains in most of the cases limited to special indications such as intolerance to the oral formulations and treatment of patients with bone metastases. The selective estrogen modulators (SERM's) family is limited to a single product on the market as of now, Raloxifene, which does inhibit bone resorption and is well documented by postmenopausal women to increase BMD and reduce vertebral fractures. In addition, a large range of positive nonosseous effects have been documented such as the reduction of the incidence of breast cancer. Other substances do have a strong anabolic effect such as Teriparatide, a recombinant human formulation of PTH 1-34. This compound has demonstrated good efficacy in postmenopausal women, increasing vertebral and hip BMD and reducing the incidence of fractures at both sites. The exact role of Teriparatide in the clinical setting is still open but its overall impact in the therapy of osteoporosis could be major due to its major efficiency over shorter periods of time. Strontium ranelate, a new divalent Strontium salt taken orally, acts both as an anti-catabolic and anabolic agent. The first results provided with strontium ranelate are very promising due to its major effect on the increase in BMD both at the vertebral and hip sites and its ability to reduce the incidence of fractures at both locations. Additional data are awaited to confirm these initial positive results.
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