A member asked:

I was using antihistamine meds&i stopped taking them 1week ago.today i took a hpt (44 days after sex), but can it be false neg because of these meds?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Promethazine: (an antihistamine) can sometimes cause a false negative on pregnancy test. Were you taking promethazine?

Answered 11/18/2014

3.5k views

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