Dextropropoxyphene is an analgesic in the opioid category that is used to treat severe pain and severe coughs. It can be used to ease pain before, during and after an operation. It is often combined with acetominophen in the preparation co-proxamol.

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... PROPOXYPHENE (Darvon®, Darvon-N®) relieves moderate to severe pain. Propoxyphene can be combined in tablets with acetaminophen. Federal law prohibits the transfer of propoxyphene to any person other than the patient for whom it was prescribed. Do not share this medicine with anyone else. Generic propoxyphene tablets, but not capsules, are available. ...
Drug Digest - more...

Dextropropoxyphene Systematic (IUPAC) name [(2R,3R)-4-dimethylami ...
Wikipedia - [full article]

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