[Frequent non-medical cannabis use: health sequelae and effectiveness of detoxification treatment].

The non-medical (recreational) use of cannabis is common particularly among young adults. In light of the ongoing legalization debate the clinical impact of physical and psychosocial consequences of regular recreational cannabis consumption should be presented. Health consequences appear to be more pronounced the earlier the regular recreational cannabis use had been started in the individual's development. There is an increasing demand from recreational cannabis users for medical treatment of cannabis-related complaints including the cannabis withdrawal syndrome. Physical sequelae such as chronic bronchitis, cyclical hyperemesis and fertility problems are usually reversible along with abstinence. The often debilitating cannabis-related mental and cognitive complaints respond on a qualified inpatient detoxification treatment with high effect sizes (Cohen's d 0.7 -1.4). The severity of the cannabis addiction benefits sustainably from psychotherapeutic approaches and individual psychosocial counseling (Cohen's d 0,5-1,2). Currently, the actual health hazard of recreational cannabis use was evaluated by addiction experts to be significantly lower than that of tobacco or alcohol use.