3 doctors weighed in:

Will the antibiotic nitrofurantoin affect my birth control pill?

3 doctors weighed in
Dr. Ben Kochuveli
General Practice
1 doctor agrees

In brief: Yes

If you are taking Nitrofurantoin while using birth control pills, you should use a back-up method of birth control (ie.
Condom). Despite the fact there is little evidence supporting a massive increase in pregnancies with antibiotic use, it is better to be safe than sorry. Use the back-up method during the run of your antibiotic and continue for one week afterwards.

In brief: Yes

If you are taking Nitrofurantoin while using birth control pills, you should use a back-up method of birth control (ie.
Condom). Despite the fact there is little evidence supporting a massive increase in pregnancies with antibiotic use, it is better to be safe than sorry. Use the back-up method during the run of your antibiotic and continue for one week afterwards.
Dr. Ben Kochuveli
Dr. Ben Kochuveli
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1 comment
Dr. H. Hunter Handsfield
Actually, probably little or no risk. See https://www.drugs.com/article/antibiotics-and-birth-control.html
Dr. H. Hunter Handsfield
Internal Medicine - Infectious Disease

In brief: No interference

It's an outdated urban myth that antibiotics interfere with effectiveness of birth control pills.
They do not, except occasionally with rifampin, an infrequently used antibiotic for certain infections like tuberculosis. And nitrofurantoin certainly has no effect. See https://www.drugs.com/article/antibiotics-and-birth-control.html

In brief: No interference

It's an outdated urban myth that antibiotics interfere with effectiveness of birth control pills.
They do not, except occasionally with rifampin, an infrequently used antibiotic for certain infections like tuberculosis. And nitrofurantoin certainly has no effect. See https://www.drugs.com/article/antibiotics-and-birth-control.html
Dr. H. Hunter Handsfield
Dr. H. Hunter Handsfield
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