The International Nonproprietary Name Dronabinol, also known as Marinol and Syndros, is a trade name for a specific form of tetrahydrocannabinol, sold as an appetite stimulant, antiemetic, and sleep apnea reliever. It is approved by the FDA as safe and effective for HIV/AIDS-induced anorexia and chemotherapy-induced nausea and vomiting only.The pharmaceutical formulation, an oily resin in capsules, is available by prescription in the US, Canada, Germany, Australia and New Zealand. Possible exceptions for off label use may be in US states passing laws reserving the right to differ from particular FDA regulations.Dronabinol is the principal psychoactive constituent enantiomer form, (−)-trans-Δ⁹-tetrahydrocannabinol, found in cannabis. Dronabinol does not include any other tetrahydrocannabinol (THC) isomers or any cannabidiol.