Quote Originally Posted by wutang123456
damn, what gets you high in tylenol pm, isn't the only active chemical in tylenol acetomophine
A regular-strength Tylenol PM tablet contains the usual 500 mg of acetominophen found in regular Tylenol. In addition, it contains 25 mg of diphenhydramine HCl, a common OTC antihistamine. One of its side effects is a fairly heavy drowsiness, and because oft his, it is also used in many OTC sleep aids, including Tylenol PM.