This is one of the first randomized, double-blind clinical trials on human subjects to study the effect of CBD on reducing cocaine cravings or risk of relapse for habitual cocaine users. The trials began immediately after 10 days in hospital detox.
800mg of CBD administered daily was not more effective than the placebo, but showed few side effects, even with this relatively high dose. The researchers said they only examined CBD, and not THC or other cannabinoids. The article in Cannabis Health News is here.