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A member asked about a 45-year-old female:

I am allergic to penicillin is it safe to take cephalexin for infection in the urine.

2 doctor answers3 doctors weighed in
Dr. David Edelman
General Surgery 39 years experience
Probably should not: Cephalexin is related to penicillin and there is a chance of an allergic reaction. Many people who are allergic to penicillin can take Cephalexin safely, but i would not suggest it.
Dr. Ronald Krauser
A Verified Doctoranswered
A US doctor answeredLearn more
Yes: Unless you had an anaphylactic reaction to penicillin (major breathing problems) there is little risk to trying cephalexin.

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Last updated Mar 13, 2020

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