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How long do birth control pills and antibiotics interact?
1 doctor weighed in

In brief: Varies
There are only a few antibiotics that interfere with birth control pills, and fortunately they are rarely used.
For antibiotics that do have an impact (rifampin, griseofulvin) effect though depends on when the antibiotics are taken in the cycle. The chemical effect is short, but if that short effect results in unintended ovulation, the impact may last the entire cycle.

In brief: Varies
There are only a few antibiotics that interfere with birth control pills, and fortunately they are rarely used.
For antibiotics that do have an impact (rifampin, griseofulvin) effect though depends on when the antibiotics are taken in the cycle. The chemical effect is short, but if that short effect results in unintended ovulation, the impact may last the entire cycle.
Dr. Nicholas Fogelson
Dr. Nicholas Fogelson
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