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A 36-year-old member asked:

How much diphenhydramine hcl will kill me?

1 doctor answer2 doctors weighed in
Dr. John Chiu
Allergy and Immunology 57 years experience
Tons: You will likely be able to tolerate at least 5 capsules without much problem except for drowsiness and a dry mouth. As for the lethal dose, i don't know the exact number but i'd doubt that even taking 20 capsules can kill you.

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Last updated Dec 12, 2020
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