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Influence of raloxifene on the efficacy of an estradiol-releasing ring for treating vaginal atrophy in postmenopausal women

Pinkerton, JoAnn V. MD1; Shifren, Jan L. MD2; La Valleur, June MD3; Rosen, Amy MS4; Roesinger, Mary RN, BSN4; Siddhanti, Suresh PhD4

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Abstract

Objective: To determine the potential interaction of oral raloxifene 60 mg/day on the efficacy of a low-dose, estradiol-releasing vaginal ring used to treat signs and symptoms of vaginal atrophy in postmenopausal women.

Design: Randomized, double-blind, placebo-controlled, parallel treatment trial of raloxifene and placebo with open-label 17β-estradiol ring. At 10 sites in the United States, 91 postmenopausal women with at least two signs of vaginal atrophy were treated with a 17β-estradiol ring and randomized to receive concomitant raloxifene 60 mg/day or placebo for 6 months. Efficacy of treatments was evaluated by comparing investigator assessments of genitourinary atrophic signs, vaginal maturation value, and participant assessments of vaginal symptoms at 6 months. Other measures included rate and severity of hot flashes and assessment of sexual function. Uterine safety was assessed by endometrial biopsy and transvaginal ultrasound.

Results: In women treated with a 17β-estradiol ring, both the raloxifene and placebo treatment groups showed improvements in signs and symptoms of vaginal atrophy at 6 months, with no significant differences in degree of improvement between groups. There were no signs of endometrial proliferation in either group.

Conclusions: Concomitant administration of raloxifene does not alter the effects of the 17β-estradiol ring on alleviating signs and symptoms of genitourinary atrophy in postmenopausal women.

©2003The North American Menopause Society

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