"i didn&#039;t know anything about this drug and was on darvocet when my workmans company suggested i switch to this. it was a little weak at first but then i got it into my system on a regular basis and it seemed to dull my pain. both heels were crushed in a fall and i had reconstruction surgery. this does make me sleepy and is terrible to get off of. i had every symptom of withdrawal listed. i had to call my doctor back and be put back onto it. beware."