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Is this a sulpha drug?
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Is this a sulpha drug?

I am allergic to sulfa drugs - is the antibiotic cephalexin (Keflex) one of these?
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Avatar f tn
No, it's not a sulfa drug.  I am allergic to sulfa drugs and apparently this as well.  But cephalexin is in the penicillin family.
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Avatar dr f tn
How are you? Sulfa drug is a class of synthetic chemical substances derived from sulfanilamide, or para-aminobenzenesulfonamide. Sulfa drugs are used to treat bacterial infections, although they have largely been replaced for this purpose by antibiotics.
Cephalexin, on the other hand, is a first-generation cephalosporin antibiotic. It is a useful alternative to penicillins in patients with penicillin hypersensitivity.

I hope this helps. Take care.
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