Strontium ranelate: the first dual acting treatment for postmenopausal osteoporosis.

UNLABELLED: Currently available medications, such as bisphosphonates, selective estrogen receptor modulators, and teriparatides, have shown their ability to reduce vertebral and/or nonvertebral fractures. Questions remain regarding their long-term innocuousness and several studies showed that adhering to currently marketed anti-osteoporotic medications remain sub-optimal. There is, therefore, an urgent need for the development of new effective, safe, and user-friendly medications to optimize the treatment of postmenopausal osteoporosis. The current review was designed to assess, through an extensive literature search, the antifracture efficacy of strontium ranelate on the axial and appendicular skeleton. Two multinational Phase 3 clinical trials have shown its efficacy and safety in the treatment of postmenopausal osteoporosis. In the Spinal Osteoporosis Therapeutic Intervention trial, strontium ranelate (2 g/day) treatment reduced the relative risk of a new vertebral fracture by 41% after 3 years compared with placebo. Data from the Treatment of Peripheral Osteoporosis study showed a 16% reduction in the relative risk of nonvertebral fracture in all patients and a 36% reduction in hip fracture in high-risk patients. Strontium rane-late reduces the risk of all fragility fractures and is well tolerated, which makes it a new first-line alternative in the treatment of postmenopausal osteoporosis.

LEVEL OF EVIDENCE: Therapeutic study, Level II (lesser quality randomized controlled trial [eg, < 80% followup, no blinding, or improper randomization]). See the Guidelines for Authors for a complete description of the levels of evidence.