How long have hives after an allergic reaction to a drug on?
Allergic urticaria most well-known product development: question addy anna : How lengthy does hives soon after an allergic reaction to drugs My 6-year-old daughter had an allergic reation to penicillanic yesterday and broke out in hives all more than my physique. I think he Benedryl every 4 hours, but when it wears off, they broke with far more. Who knows how long they could continue to go out with them? Or some thing else I ought to do to assist Best answer: Caroline's response Rosario