RT Book, Section A1 Katzung, Bertram G. A1 Kruidering-Hall, Marieke A1 Tuan, Rupa Lalchandani A1 Vanderah, Todd W. A1 Trevor, Anthony J. SR Print(0) ID 1180559343 T1 Cannabinoid Drugs T2 Katzung & Trevor's Pharmacology: Examination & Board Review, 13e YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9781260117127 LK accesspharmacy.mhmedical.com/content.aspx?aid=1180559343 RD 2024/04/18 AB Currently available cannabinoid drugs consist of one major subgroup that act at the CB1 receptors. However, there are rapidly developing alternative groups of drugs that target newly discovered receptors as well as new drugs that are designed to enrich endogenous cannabinoids.Delta-9-tetrahydrocannabinol (THC) may be considered the prototype that acts directly at both CB1 and CB2 receptors. However, THC has made little progress in clinical use due to the psychoactive component, which is thought to be due mainly to action at the CB1 receptor. Novel cannabinoids are being discovered that lack this unwanted (in clinical usage) effect.