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A member asked:
I am an combined birth control pill i take it every am. last night i took 150mg nitrofurantoin. do i need to take plan b if i had sex two days ago? will my pill be affected?
A doctor has provided 1 answer
About antibiotics...: The current thinking is that except for rifampin, other commonly-used antibiotics (such as nitrofurantoin and many others) do not alter the effectiveness of birth control pills. This is likely presuming a person is not sick with vomiting or rapid diarrhea, or some other condition that decreases the absorption of a swallowed pill. One can look up: http://www.ncbi.nlm.nih.gov/pubmed/12063491
Answered 2/14/2020
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