A member asked:

I'm 33 years old and on doxycycline for acne, about 3 weeks now. can this medication effect my period? taken 2 pregnancy tests negative. help!

3 doctors weighed in across 2 answers
Dr. Ron Eaker answered

No: Taking an antibiotic should not interfere with the regularity of your cycle unless you're using birth control pills.

Answered 4/25/2016

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Doxycycline & menses: Doxycycline does not affect menstrual cycles. If a woman is taking Doxycycline and is on a birth control pill, Doxycycline can potentially make the pill less effective. There are other causes besides pregnancy that could cause a delayed period, such as stress, for example, that can also cause more acne breakouts as well. The best way to make sure about pregnancy is to have a blood test done.

Answered 4/25/2016

5.2k views

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