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Had my last period end on October 14th then had sex october 17th. The 18th I took plan b which was a sunday. I had symptoms almost immediately I was bleeding as if I had gotten my period. Then that following wednesday i was prescribed medicine for strep throat. Can that cancel the affects of the plan b pill? I have yet to get my period and it is November 14th. Im stressing out alot which can also be a factor why my periods late. someone please respond.
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Hi Anon,
Thank you for reaching out to the EmpowHER community and sharing your question. I am sorry to hear that you are so stressed, but it is very unlikely that you are pregnant.
According to Planned Parenthood, only one antibiotic is shown to make hormonal birth control less effective. That is rifampin, a special medication used to treat tuberculosis. The brand names for rifampin include Rifadin and Rimactane. Other antibiotics do not make hormonal birth control less effective.
If you took Plan B exactly as prescribed you should be fine.
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Best,
Kristin
November 14, 2014 - 1:55pmThis Comment