Adolescent cannabis use is associated with an increased risk of psychosis and bipolar disorder, according to a cohort study published in JAMA Health Forum[1]. A study looked at nearly half a million young people and found that the risk of psychotic and bipolar disorders was approximately double in those who used cannabis compared to those who did not[1]. This effect persisted even after taking into account previous mental illness and use of other substances[1]. Researcher Kelly Young-Wolff said adolescent cannabis exposure is a potential risk factor for the development of mental disorders[1]. Nearly a quarter of US adults believe psilocybin should be legal[original content]. The article also deals with addiction to dopamine agonists[original content].