A member asked:

Tylenol (acetaminophen) pm makes me jumpy and i get cold why does this happen?

A doctor has provided 1 answer

Idiosyncratic Rxn: Idiosyncratic reactions are an unexpected response to drug from its usual action. For example, most of the time the antihistamine Benadryl (diphenhydramine) has a side-effect of drowsiness but in some individuals it can cause hyperactivity.

Answered 6/24/2014

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