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Official Answer by Drugs.
You should definitely talk to your doctor about that!
We normally use condoms but didn't this time.
I was on a different birthcontrol before that but I had to change it since I had my period for over 2 months but the new one works.
We used a condom, but we realized we had put it on upside down and had to flip it over before getting busy.
Common Questions and Answers about Antibiotics effect on birth control.
Certain antibiotics are believed not to have that great an effect on birth controlbut I'm not sure if this is one.
PubMed, 8 Oct.
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A few days ago I started a 10 day course of Clarithromycin antibiotics.