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Randomised trial, 1992

Does fluoxetine (Prozac) help severe PMS?

Yes. Fluoxetine significantly improved behavioral symptoms by 75%, physical symptoms by 40%, and total symptoms by 62% compared to placebo, with no significant side effects.

Early or limited evidence 8 women with severe persistent PMS

What they did

A randomized, double-blind, crossover study in 8 women with severe PMS. Women took either 20 mg of fluoxetine daily or placebo for three months each, in random order, with a total study duration of six months.

What they found

Compared to placebo, fluoxetine led to significant reductions in behavioral symptoms (75% improvement), physical symptoms (40% improvement), and total PMS symptoms (62% improvement). Improvements in mood-related measures including depression, tension, and anger were also significant. No significant side effects were noted.

What it means for you

Fluoxetine appears to be an effective treatment for severe PMS, especially for mood-related symptoms. The main limit is the very small sample size of just eight women.

8

women

20

mg fluoxetine daily

62%

improvement in total symptoms

About the study

Original title
Treatment of premenstrual syndrome with fluoxetine: a double-blind, placebo-controlled, crossover study
Authors
Wood SH, Mortola JF, Chan YF et al.
Journal
Obstetrics and gynecology
Year
1992
Study design
Randomised trial
What was tested
20 mg fluoxetine daily vs placebo

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