go to
www.rxlist.com

and look em up
no street value but they are NARCOTICS
will make you fial a piss test for opiods content
if you take enough to get a buzz
you will puke and probly eat out your stomach lining

great for hangover's headacke though
if you can stomach them that is

here.
http://www.rxlist.com/cgi/generic3/propoxnap.htm
Brand Name: DARVOCET-N DARVOCET Patient Info
(or PROPOXYPHENE) CheckRx!
Generic Name: PROPOXYPHENE NAP/APAP
Drug Class: OPIATE AGONISTS