Looks like Kindhead got this one
http://www.drugs.com/forum/topic.asp?TOPIC_ID=10011
Imprint: 1772 <> M
Description: Tab, Pink, Oval, M inside square
Drug/Strength:
Acetaminophen 650 mg,
Propoxyphene Napsylate 100 mg
Brand (or equiv.): Darvocet-N 100
Firm: Mallinckrodt
NDC#: 00406-1772
Class;Sch: Analgesic; CIV
Regards,
J
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A "Thank You" goes a long way.....