Can cephalexin affect pregnacy test results?

Patient

Q: Yess hello ive been two days late im my period i have tender breast and very hard ive been taking cephalexin 500mg for a UTI ive been taking a home pregnancy test they been coming out negative can it be that cephalexin is interfering with my Pregnacy hormone?

Symptoms:  Tender breast
Doctor

A:   No Cephalexcin will in no way affect the pregnancy test results. Your periods could have been delayed due to UTI . You may repeat the test after a week if you still have not got your periods and then visit your doctor . Also if you do not want to have a pregnancy now then please do practice safe sex.

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