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A member asked:
Which antibiotic more commonly causes a skin rash, bactrim (sulfamethoxazole and trimethoprim) or keflex? and one you have had a rash is likely to reappear
A doctor has provided 1 answer
Antibiotic rash: All antibiotics can cause rash in any person ar any time. The most common cause of drug allergy is penicillin probably because it is prescribed the most. Most would say that penicillins (and Keflex is a relative altho likelihood of drug rash is less) are the most common cause of drug rash. Sulfas are in the top 3.
Answered 2/28/2019
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