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A member asked:
I have asthma and seasonal allergy's. currently i use chlorpheniramine tabs 4mg. available in my otc produces bcns formulary book) also available is diphenhydramine 25mg. what is the difference beside mg amount?
A doctor has provided 1 answer
They are both members of the sedating antihistamine family. The diphenhydramine has just been available over the counter for much longer. Individual response to any of these drugs can vary.
Answered 9/11/2023
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