Experimental: Nabilone and EX/RP
Will receive nabilone at 1 mg daily (BID) plus therapist-guided Exposure and Response Prevention Therapy during 4 weeks.
Drug: Nabilone
Nabilone is a synthetic cannabinoid that is thought to be a Cannabinoid receptor type 1 (CB 1) agonist. It acts on the brain’s “endocannabinoid system,” which has been hypothesized to play a role in OCD.
Behavioral: Exposure and Response Prevention Therapy
Exposure and Response Prevention Therapy (EX/RP) is a type of Cognitive-Behavioral Therapy for OCD that involves intentionally confronting situations that trigger obsessional distress while refraining from doing compulsions.