Interesting article...
Nancy A. Melville
March 17, 2014
PHOENIX, Arizona — A novel hormone therapy combining oxytocin and human chorionic gonadotropin (hCG) shows the potential to improve pain while allowing for opioid dose reductions in patients with intractable pain, results of a preliminary study suggest.
Both hormones have been shown to have neurogenic and analgesic properties and have been linked anecdotally to reductions in pain and the need for pain medicine among pregnant women...
http://www.medscape.com/viewarticle/822093