A member asked:

Can taking cephalexin mask my std (bacteria) test result? i took it from 12/31-1/2/23 morning. this was non related to std when they gave me the prescription. after taking it i took the swab test on jan 2 and it came neg?

A doctor has provided 1 answer
Dr. Hunter Handsfield answered

Specializes in Infectious Disease

It depends on the STD. Cephalexin isn't normally used for STD treatment. It might cure gonorrhea or, less likely, interfere with a positive gonorrhea test. It has no effect on testing for anything else: all other STD tests you may have had (e.g. chlamydia, syphilis, HPV, herpes, etc) are unaffected by cephalexin. If any continuing doubt, discuss with the doctor or clinic where you were treated.

Answered 1/28/2023

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