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A member asked:

How much diphenhydramine will cause one to hallucinate?

A doctor has provided 1 answer

Toxicity: Every human body reacts to a drug differently. In some children, even one dose of Benadryl (diphenhydramine) will make them very hyper (known as a paradoxical reaction). First and foremost, you should always follow the labeled instructions on all otc medications. If still unsure, speak to your physician.

Answered 4/17/2016

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