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A member asked:
Is taking 300mg of diphenhydramine bad for you?
3 doctors weighed in across 2 answers
Too high dose: Normal adult dose is 50 -100 mg, 300 mg is way too much.
Answered 3/20/2014
4.3k views
Thank
Probably: You may need up with very dry mouth, drowsiness, constipation, and even a fast heart rate from such a high dose.
Answered 3/20/2014
4.3k views
Thank
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