Here's an article I found in a German source that may be of interest.

Perhaps some of you have already come across this in US sources.

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(please forgive online translator mistakes)

[China Root: Researchers isolate active against neuropathic pain
Friday, January 3, 2014

Irvine - The Herbalom project, a joint initiative between Chinese and American pharmacologist, has led to the discovery of a new painkiller. The active ingredient DHCB (Dehydrocorybulbin) has in animal studies in Current Biology (2014; 10.1016/j.cub.2013.11.039) alleviated neuropathic pain, without leading to the development of tolerance. The isolation of the drug could lead to the development of a new analgesic.

The German Research Network on Neuropathic Pain estimates that 6 percent of the population suffer from neuropathic pain. They are the result of structural nerve damage and can after surgery, in the context of diabetes, according to herpes zoster or strokes and occur in patients with multiple sclerosis. Drug treatment of neuropathic pain is currently not satisfactory. ]

© rme / aerzteblatt.de (edit due to copyrighted article- © Deutsches Ärzteblatt, Ärzte-Verlag GmbH, entwickelt von L.N. Schaffrath DigitalMedien GmbH)

Original article in German source:
http://www.aerzteblatt.de/nachrichte...sche-Schmerzen

Translated from German via google translate:
http://translate.google.com/translat...rzen&sandbox=1