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Which antibiotics affect birth control pills?

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Antibiotics that have been shown to interact with birth control pills include rifampin (Rifadin), and to a lesser extent, penicillin, amoxicillin, ampicillin, sulfamethoxazole/trimethoprim (Bactrim), tetracycline, minocycline, metronidazole (Flagyl) and nitrofurantoin (Macrobid or Macrodantin).
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