Preliminary efficacy andsafety of an oromucosalstandardized cannabisextract inchemotherapy-inducednausea and vomiting 22 Nov Dr D Multicenter, double-blind, randomized, placebo-controlled, parallel-group study of the efficacy, safety, and tolerability of THC:CBD extract and THC extract in patients with intractable cancer-related pain. Preliminary assessment of the efficacy, tolerability and safety of a cannabis-based medicine (Sativex) in the treatment of pain caused by rheumatoid arthritis.