I ran across this article on pain management which describes an 8-step strategy to determine equianalgesic oral and parenteral doses of opiods, e.g. meperidine, morphine, codeine, oxycodone, methadone, levorphanol, hydromorphone, and fentanyl and how to address changes in routes of administration.

There's a very brief description of neuropathic pain but it doesn't offer anything new as far as agents to address PN. Nonetheless, the article might help when people need to change among the opiod and related meds or change the route of administration.

http://www.clinmedres.org/cgi/reprint/1/4/337.pdf

Alkymst