All the following drugs act on cannabinoid receptors except
Nabilone
Rimonabant
Mescaline
Dronabinol
Mescaline does not act on cannabinoid receptors. Dronabinol and nabilone increase appetite and act as antiemetics. Rimonabant is banned now(D/T increased suicides) Mescaline is a naturally occuring hallucinogenic drug. Ref: KD Tripathi, 8th ed
Central Nervous system