So... I re-read the leaflet that came with my meds I got today and was reading the Darvocet N-100 leaflet and it said it was for mild-moderate pain.
I started on Darvocet N-100. They actually helped for a few months. I don't know if I built a tolerance quickly, or if the pain got worse, but at two months into them, I ended up calling my RD begging for something else. He gave me Lortab and I could tell a huge difference between the two.
Darvocet has been shown in double-blind studies to be no more effective against pain than the equivalent amount of plain acetaminophen in the Darvocet tabs. Propoxyphene (the opiate in Darvocet) has all of the risks and little, if any, benefit (unless you want a bit of a buzz with your tylenol). It has a narrow therapeutic range, which means it's relatively easy to OD on it.