Otenabant (CP-945,598) is a drug which acts as a potent and highly selective CB1antagonist. It was developed by Pfizer for the treatment of obesity, but development for this application has been discontinued following the problems seen during clinical use of the similar drug rimonabant.
^Woods SC. The endocannabinoid system: novel pathway for cardiometabolic Risk-factor reduction. Journal of the American Academy of Physician Assistants. 2007 Nov;Suppl Endocannabinoid:7-10. PMID 18047036