Natural-born painkiller found in human saliva

Saliva from humans has yielded a natural painkiller up to six times more powerful than morphine, researchers say.The substance, dubbed opiorphin, may spawn a new generation of natural painkillers that relieve pain as well as morphine but without the addictive and psychological side effects of the traditional drug.

Natural-born painkiller found in human saliva - health - 13 November 2006 - New Scientist