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A member asked:
Penicillin allergy, after 8 pills: got hives, especially fastidious on the gluteus (3 days). i started benadryl (diphenhydramine) yesterday. how long will hives last?
3 doctors weighed in across 2 answers
Hives: They may take 2 to 3 days, but if bad, you need to see a doctor.
Answered 9/8/2013
4.9k views
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Hard to say: Take the Benadryl (diphenhydramine) regularly as your dr. Prescribed...It could take several days to go away....But as long as there is no significant swelling(unlikely to occur now..I presume you stopped the penicillin) there should be nothing to worry about....
Answered 5/26/2016
4.9k views
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