via cbc.ca
The U.S. Food and Drug Administration had data 15 years ago showing over-the-counter sleep aid products such as Tylenol PM and Excedrin PM don't offer a significant benefit to patients, according to a letter obtained by CBC News.
Read more: http://www.cbc.ca/health/story/2010/05/05/con-sleep-meds.html#ixzz0n7OP9J3c
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