6 doctors weighed in:

Taking metronidazole for bacterial vaginosis. Will metronidazole affect my menstrual cycle or period? Will bacterial vaginosis affect my menstrual cycle or period?

6 doctors weighed in
Dr. John Froude
Internal Medicine - Infectious Disease
5 doctors agree

In brief: On pill? yes

Flagyl can interfere with the absorption of the pill and this rarely leads to unexpected pregnancy If you are not on the pill it should not affect your period.
Don't drink alcohol when you take it, it will make you feel sick.

In brief: On pill? yes

Flagyl can interfere with the absorption of the pill and this rarely leads to unexpected pregnancy If you are not on the pill it should not affect your period.
Don't drink alcohol when you take it, it will make you feel sick.
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