It is unlikely that 1 or 2 doses of penicillin would significantly decrease your protection. However, a “normal course” of 7, 10 or 14 days of this would. It is important to use a back up method of birth control during the time you are on the antibiotics, and for at least 7 days after. Abstinence, condoms, or vaginal spermicides are affordable options.
4. February 2012
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