A member asked:

My last cycle was nov 5 today is dec 17. i am on sulfamethoxazole could this cause a delay in my menstrual cycle? usual 30-38 days. tested neg. hpt

A doctor has provided 1 answer

Dr. Martin Raff answered

Menses irregular: You do not say when your HPT was negative. Check again and if still negative is is possible that whatever the sulfamethoxazole was being used for is delaying your period, but if this continues after stopping it you might check in with your GYN.

Answered 12/18/2014

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A member asked:

My last cycle was nov 5 today is dec 17. i am on sulfamethoxazole could this cause a delay in my menstrual cycle? usual 30-38 days. tested neg. hpt

A doctor has provided 1 answer

Dr. Martin Raff answered

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