A 32-year-old female asked:
Can penicillin affect a menstrual cycle?
1 doctor answer
Dr. Nancy Mellow answered
43 years experience in Internal Medicine
Not usually: Antibiotics don't usually affect your cycle. However, sometimes the reason you're on the antibiotic, such as a severe infection or high fever, can delay ovulation and affect your next cycle.
Answered on Mar 26, 2013
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