Valproic acid for pain?

Never heard of using it for pain.
I did find these:
Valproic Acid Not Effective for Polyneuropathic Pain
http://www.medscape.com/viewarticle/468519

Valproate for treatment of chronic central pain after spinal cord injury. A double-blind cross-over study.
http://www.ncbi.nlm.nih.gov/pubmed/7970862

http://www.cancer.org/docroot/CDG/co...proic_acid.asp

http://www.spineuniverse.com/display...ticle1614.html

http://books.google.com/books?id=lg7...20pain&f=false

And quite a bit of information on Valproate sodium for the treatment of migraines.

I found this:

"The valproic acid drugs are used as non-opioid pain relievers. They belong to a general class of drugs called anticonvulsants. These drugs may be given along with pain medicines to help control neuropathic pain of cancer (numbness, tingling, burning, shooting, or electric-shock-like pain.) They are also used for preventing seizures, preventing migraine headaches, and other purposes."