The endocannabinoid system is composed of endocannabinoids, such as anandamide and 2-arachidonoylglycerol (2-AG), their metabolizing enzymes and cannabinoid receptors. To date, two cannabinoid receptors have been identified by molecular cloning, the CB1 and CB2 receptors. The endocannabinoid system has been implicated in a number of physiological functions, and pharmacological manipulation of this ...