Time: Depending on the severity and the type of reaction, the time may vary from a day to a few weeks. For most patients developing a rash or hives from penicillin, taking an otc antihistamine 3 to 4 times a day (much higher dose than used in hay fever) may be helpful . Others may need a short course of prednisone. For anaphylaxis, injectable epinephrine. Assumed you have stopped taking the drug.
Answered 8/4/2013
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2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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