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Non-randomised trial, 1991

Does mefenamic acid help PMS symptoms?

Yes. A randomized double blind trial of 15 women found that mefenamic acid 500 mg three times daily reduced irritability, anxiety, abdominal swelling, and headaches compared with placebo.

Moderate study design 15 women with premenstrual tension

What they did

15 women with premenstrual tension received either mefenamic acid 500 mg or placebo three times daily from day 14 of one cycle until day 2 of the next cycle in a randomized double blind crossover design (each woman received both treatments in different cycles).

What they found

Mefenamic acid relieved irritability, anxiety, abdominal swelling, and headaches compared with placebo (P < 0.05, statistically significant).

What it means for you

Mefenamic acid, an anti-inflammatory pain reliever, appears to help several PMS symptoms. This was a small study, so results need confirmation in larger trials.

15

women studied

500 mg

mefenamic acid dose

3 times daily

dosing frequency

About the study

Original title
Mefenamic Acid and the Premenstrual Syndrome
Authors
MARGARET C. P. REES, J. Randle, Pat Yudkin
Journal
Journal of Obstetrics and Gynaecology
Year
1991
Study design
Non-randomised trial
Participants
15
What was tested
Mefenamic acid 500 mg three times daily, from day 14 of cycle to day 2 of next cycle

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