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A 17-year-old female asked:

i've been taking amoxicillin and prednisolone, now i'm 4 days late for my period, but on birth pill, pregnant?

3 doctor answers3 doctors weighed in
Dr. John Chiu
Dr. John Chiu answered
Allergy and Immunology 57 years experience
Hard to tell: There was suggestion that antibiotic might render BCP less effective but scientific support is lacking. On the other hand, I presume that you are taking amoxil (amoxicillin) and prednisone because of an illness (sinusitis?).and illness and stress can affect your menses. If you are concerned, why not get yourself tested for pregnancy?
Dr. Elvia Greathouse
Obstetrics and Gynecology 22 years experience
Pregnant?: Antibiotics like amoxicillin can certainly slightly decrease the efficacy of OCPs. If you are late for your period, take a pregnancy test.
Dr. Yash Khanna
Family Medicine 57 years experience
Unlikely pregnant: If you are on Birth Control Pill,It is very unlikely that you are pregnant Period can be late because of your underlying condition for which you are being treated with Prednisone and Amoxicillin OR It may be an effect of Prednisone,as Prednisone can cause irregular periods as well

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Last updated Sep 29, 2016

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