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Dr. Andrew Rynne
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Taken Biaxin for pneumonia. Had intercourse. Cramps, bloating. Does Biaxin interfere with periods?

Hi I was diagnosed with a pneumonia during the last month and took Biaxin for 10 days 2x a day. My menstrual cycle is normal at 33 days. The date of my last period was 3-19-2013 and the one time I had intercourse (with a male condom) was on 4.12.2013. I'm 3 days late. I have mild cramps and feel bloated, but no breast tenderness, no frequent urination, no nausea or vomiting. Does Biaxin interfere with your period?
Fri, 21 Jun 2013
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Hello and welcome to HCM.

Thank you for your query.

Although there are no documented articles on Biaxin interfering with the menstrual cycle, there have been cases of Biaxin interference with the female reproductive tract causing vaginal irritation, itching, discharge, menstrual irregularities, etc. So, yes, there is a chance that the medication has caused an interference.

But, I would only assume this after conducting a pregnancy test. I would recommend a home pregnancy test, that should be conducted at least 2 weeks after your last sexual contact or after the first day of a missed period. An early morning urine sample would yield a most accurate result in such cases.

Only once pregnancy has been ruled out, for which you might need to conduct the home pregnancy test at least 2-3 times; can we assume Biaxin to be the culprit.

I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: . I would gladly help you.

Best wishes.
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