Hur funkar egentligen propofol?

Jag vet ju att man nanar kudden gott av det då jag fått det otal gånger, men vad är det egentligen medlet gör och varför somnar man av det? Jag sökte runt och hittade inget riktigt svar på det.
Tack och hej
Pastor Pastej

"Its mechanism of action is uncertain, but it is postulated that its primary effect may be potentiation of the GABA-A and glycine receptors, possibly by slowing the channel closing time. Recent research has also suggested the endocannabinoid system may contribute significantly to propofol's anesthetic action and to its unique properties." (http://en.wikipedia.org/wiki/Propofol, Fowler, CJ. "Possible involvement of the endocannabinoid system in the actions of three clinically used drugs." Trends Pharmacol. Sci. 2004 Feb;25(2):59-61.)