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Date of last update: 10/14/2017.

Forum Name: Gynecology

Question: Antibiotics and The Pill

 starless - Sun Jan 15, 2006 8:31 pm

Hello, I know that if you are antibiotics it reduces the effectiveness of the pill. My question is can antibiotic ointments like Polysporin do the same thing or is the dosage in it too small? Also, How long after taking antibiotics should you wait to have sex to be protected again? Thankyou.
 Dr. Tamer Fouad - Mon Jan 16, 2006 1:28 am

User avatar Hello,

Polysporin is a First Aid topical antibiotic that contains Bacitracin 500 units and Polymyxin B 10,000 units.

These drugs in general are not known to interact with contraceptive pills.

Additional contraceptive method should be used while taking an the following interacting drugs and for 7 days thereafter:[1]
    Carbamazepine (Tegretol)
    Ethosuximide (Zarontin)
    Metronidazole (Flagyl)
    Phenytoin (Dilantin)
    Primidone (Mysoline)
    Rifampin (Rifadin)
    Troglitazone (Rezulin)
    Macrolide antibiotics such as erythromycin

Best regards.

1. Hatcher RA, Trussel J, Stewart F, Cates W Jr, Stewart GK, Guest F, et al. Contraceptive technology. 17th rev. ed. New York: Ardent Media, 1998:451-3.

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