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Non-randomised trial, 1984

Does elevated prolactin cause premenstrual tension?

No. Prolactin levels were normal in women with severe PMS. When a drug that lowers prolactin was given, hormone levels changed but symptoms did not improve.

Early or limited evidence 37 women with severe premenstrual tension syndrome plus 4 asymptomatic controls

What they did

Measured prolactin levels at different cycle phases in 37 women with severe PMS and 4 controls. Later, 30 women with severe PMS were treated with bromocriptine.

What they found

All prolactin values were normal. Afternoon prolactin showed slight increase before period in some women, but one-third had decreased levels. Bromocriptine changed hormone levels but did not improve symptoms.

What it means for you

Prolactin probably does not cause PMS. The study was very small (37 women, only 4 controls) and included only women with severe symptoms, limiting how much we can generalize.

37

Women with severe PMS

30

Treated with bromocriptine

1/3

Had decreased prolactin before period

About the study

Original title
Plasma prolactin and severe premenstrual tension
Authors
Steiner M, Haskett RF, Carroll BJ et al.
Journal
Psychoneuroendocrinology
Year
1984
Study design
Non-randomised trial
Participants
26
What was tested
Bromocriptine (a drug that affects prolactin levels)

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