A 61-year-old female asked:
very allergic to sulfa drugs, took 1 bactrim (sulfamethoxazole and trimethoprim) 800 in error. what should i do?
1 doctor answer
Dr. Robert Kwok answered
33 years experience Pediatrics
Antihistamine helps: In such a situation, one can take antihistamines such as Benadryl, (diphenhydramine) Claritin, Allegra, or Zyrtec (all over-the-counter) and call her primary care doctor. What the doctor might do will likely depend on the type of reaction the patient has had in the past, how severe the reaction was, how fast the reaction happened, etc... Immediate, severe allergic reactions require an injection (EpiPen) and 911.
Answered on Jul 20, 2016
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