A member asked:

On keflex for 13 days...this am broke out in hives head to toe. is this most likely allergic reaction to the keflex?

6 doctors weighed in across 2 answers

Possibly: Allergy to a drug can develop at any time while taking it.

Answered 8/24/2013

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Yes: And you should not only stop the Keflex immediately, but make sure that you never again take a cephalosporin antibiotic without being in the presence of a doctor who knows what occurred with the Keflex and is trying to desensitize you to treat an infection that cannot be managed with an alternative class of drugs.

Answered 6/26/2014

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