Compared with delayed treatment in adults with cannabis use disorder (mostly in their 20’s and 30’s), motivational enhancement therapy (MET) or cognitive‐behavioral therapy (CBT) may reduce the number of days of cannabis use (on average, by 5.67 days; moderate‐quality evidence), the number of joints per day (very low‐quality evidence), symptoms of dependence (low‐quality evidence), and cannabis‐related problems (including medical, legal, social, or family‐related; low‐quality evidence) when results for these outcomes are elicited for the 30 days immediately before the date of assessment. These apparent benefits were observed for both high‐intensity (more than four sessions, or treatment duration longer than one month) and low‐intensity interventions. However, follow‐up was relatively short (up to 34 weeks), so whether these changes in cannabis use are sustained over the longer term remains unclear.