JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

A randomized, double-blind, placebo-controlled study of the lowest effective dose of drospirenone with 17β-estradiol for moderate to severe vasomotor symptoms in postmenopausal women

David F Archer, Thomas Schmelter, Matthias Schaefers, Christoph Gerlinger, Kerstin Gude
Menopause: the Journal of the North American Menopause Society 2014, 21 (3): 227-35
23963307

OBJECTIVE: This study aims to investigate the efficacy and safety of daily drospirenone/17β-estradiol in two low-dose combinations (0.25 mg/0.5 mg and 0.5 mg/0.5 mg, respectively) versus 17β-estradiol (0.3 mg) or placebo in postmenopausal women with moderate to severe vasomotor symptoms.

METHODS: Seven hundred thirty-five postmenopausal women aged 40 years or older who experienced a minimum of 7 to 8 moderate to severe hot flushes per day, or 50 to 60 moderate to severe hot flushes per week, participated in a 12-week, double-blind, randomized, placebo-controlled study. The primary efficacy variables were mean changes from baseline to weeks 4 and 12 in the weekly frequency and weekly mean daily severity of moderate to severe hot flushes recorded daily by the participants on diary cards.

RESULTS: All active treatments were significantly more effective than placebo for the primary efficacy variables for drospirenone/17β-estradiol (P < 0.0001), and for 17β-estradiol (P < 0.01) at 4 and 12 weeks. Efficacy was greater for both low-dose drospirenone/17β-estradiol combinations versus the lower-dose 17β-estradiol. Change in vaginal pH and vaginal maturation index showed significant improvements (with P values versus placebo of <0.0001 and P ≤ 0.0028, respectively), and exploratory analysis of the Clinical Global Impressions scale score indicated an overall satisfaction of women with active treatments. All active treatments were generally well tolerated with low rates of adverse event-related dropouts, and the safety profile of drospirenone/17β-estradiol in both low-dose combinations was consistent with previous studies.

CONCLUSIONS: Drospirenone 0.25 mg/17β-estradiol 0.5 mg is concluded to be the lowest dose with demonstrated efficacy in the treatment of postmenopausal women with moderate to severe vasomotor symptoms.

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