Tylenol murders -- Mary Kellerman, first victim, was found at 7 am.

Three other deaths were in one family (total of seven).

http://www.trutv.com/library/crime/terrorists_spies/terrorists/tylenol_murders/index.html

No date for release of Tylenol, only year, so far found.
 
<< In 1953, McNeil Laboratories introduced Algoson, a preparation containing paracetamol together with sodium butabarbital, a sedative. >>

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