Darvocet ( propoxyphene ) is related in structure to methadone, but only has a potency 2/3 equal to that of codeine. ( from the PDR )
Lortab (hydrocodone) is a hydrogenated ketone of codeine and atleast twice as potent as codeine.
Which would i choose? Lortab for sure, Darvon has a nasty habit of giving people cardiac arrythmias in high doses.
W~