Free Republic

Researchers have found that cannabinoid hyperemesis syndrome, a vomiting condition tied to chronic cannabis use, rose sharply in US emergency departments between 2016 and 2022 and has stayed elevated. As of June 2025, nearly half of US residents live in states with legalized recreational cannabis, and policy shifts have expanded adult-use access through legalization, medical programs, and decriminalization. Among cannabis-related harms, cannabinoid hyperemesis syndrome (CHS) has been described as a growing concern in clinical and public health settings. CHS was first identified in 2004 in Australia and remains a syndrome with uncertain etiology. Proposed neurophysiological mechanisms include downregulation of cannabinoid...

“The increased risk of getting schizophrenia after drug-related psychosis is even higher than what we find in first-degree relatives of those who have been given the diagnosis,” Bramness says. First-degree relatives are parents and children. The risk of being diagnosed with the malady for sons and daughters of a sick mother or father is "only" five to ten per cent. In other words, there is no other risk factor for schizophrenia that is higher than related to drug-induced psychoses. Trauma, infections and moving to another country are other known risk factors for schizophrenia, but these increase the risk to a...