A member asked:

How come my son ended up getting strep 3 days after started taking cephalixen, cetirizine, and cimetidine?

A doctor has provided 1 answer
Dr. James Ferguson answered

Specializes in Pediatrics

Confusing question: Strep is killed by cephalexin and a positive quick test would be possible because it will be so with dead germs.A positive culture would be less likely, but possible with a vigorous sampling technique.I would assume the strep was already present but additional testing confirmed it.

Answered 7/20/2014

3.9k views

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