Some early synthetic cannabinoids were also used clinically. Nabilone, a first generation synthetic THC analog, has been used as an antiemetic to combat vomiting and nausea since 1981. Synthetic THC (marinol, dronabinol) has been used as an antiemetic since 1985, and an appetite stimulant since 1991, although synthetic THC is often not listed among the "synthetic cannabinoids" but as a "synthetic phytocannabinoid."
