This pill is
Propoxyphene Napsylate 100 mg and Acetaminophen 650 mg
Generic for: Darvocet N-100®
Description: Pink/Capsule Shaped Tablet
Identification Code: Debossed "1772" on one side, boxed "M" on the other side
You will find an image at pharmaceuticals.mallinckrodt.com
Info at
http://acetaminophen.and.propoxyphene.drugs.com