JWH-018 (1-pentyl-3-(1-naphthoyl)indole, NA-PIMO or AM-678) is an analgesic chemical from the naphthoylindole family that acts as a full agonist at both the CB1 and CB2 cannabinoid receptors, with some selectivity for CB2. It produces effects in animals similar to those of tetrahydrocannabinol (THC), a cannabinoid naturally present in cannabis, leading to its use as synthetic cannabinoid products that, in some countries, are sold legally as "incense blends".
As a full agonist at both the CB1 and CB2 cannabinoid receptors, this chemical compound is classified as an analgesic medication. The analgesic effects of cannabinoid ligands, mediated by CB1 receptors are well established in treatment of neuropathic pain, as well as cancer pain and arthritis.