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Question
Posted by: Paranoid | 2010-08-10

Antibiotic

Hey Doc

I was recently on antibiotic and i understand that it cancels our the contraceptive pill (nordette). i was on the antibiotic from Monday 12 July till Friday the 16th. The Monday following i got a very strange period, which disappeared every now and then, and the Tuesday morning my husband and i had sex, and the period never came back. Now what i want to know is, do you think its possible to have fallen pregnant that time if I started the antibiotic the Monday before? how long does the antibiotic take to cancel out the pill? I am now on my last row of cream tablets and should start my normal period by next week this time… 
thanks!

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Our expert says:
Expert ImageCyberDoc

Hallo Paranoid
Not all antibiotics are risky, but the general rule to follow is: if you use an antibiotic while on the pill, rather use extra protection like using condoms until your next menstruation. The antibiotics interfere with the absorbtion of the pill, causing possible low levels of hormones, which may lead to ovulation, or break-through bleeds.
dr Bets

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Our users say:
Posted by: Cyberdoc | 2010-08-10

Hallo Paranoid
Not all antibiotics are risky, but the general rule to follow is: if you use an antibiotic while on the pill, rather use extra protection like using condoms until your next menstruation. The antibiotics interfere with the absorbtion of the pill, causing possible low levels of hormones, which may lead to ovulation, or break-through bleeds.
dr Bets

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