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Lasofoxifene for the prevention and treatment of postmenopausal osteoporosis

Authors E Michael Lewiecki

Published 14 October 2009 Volume 2009:5 Pages 817—827

DOI https://doi.org/10.2147/TCRM.S5645

Review by Single-blind

Peer reviewer comments 2

E Michael Lewiecki

New Mexico Clinical Research & Osteoporosis Center, Albuquerque, NM, USA

Abstract: Lasofoxifene is a selective estrogen receptor modulator (estrogen agonist/antagonist) that has completed phase III trials to evaluate safety and efficacy for the prevention and treatment of osteoporosis and for the treatment of vaginal atrophy in postmenopausal women. In postmenopausal women with low or normal bone mineral density (BMD), lasofoxifene increased BMD at the lumbar spine and hip and reduced bone turnover markers compared with placebo. In women with postmenopausal osteoporosis, lasofoxifene increased BMD, reduced bone turnover markers, reduced the risk of vertebral and nonvertebral fractures, and decreased the risk of estrogen receptor-positive breast cancer. In postmenopausal women with low bone mass, lasofoxifene improved the signs and symptoms of vulvovaginal atrophy. Clinical trials show that lasofoxifene is generally well tolerated with mild to moderate adverse events that commonly resolve even with drug continuation. Lasofoxifene has been associated with an increase in the incidence of venous thromboembolic events, hot flushes, muscle spasm, and vaginal bleeding. It is approved for the treatment of postmenopausal women at increased risk for fracture in some countries and is in the regulatory review process in others.

Keywords: osteoporosis, SERM, fracture, efficacy, safety, BMD, CP-336,156

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