Israelis Warned of Spread of New Syndrome

Doctors in Israel report a rise in cases of cannabinoid hyperemesis syndrome (CHS) among Israelis. In the US, hospitalizations increased by 16% in a year. The syndrome is linked to long-term cannabis use and manifests as nausea, vomiting, and abdominal pain. Young people aged 15–24 are most affected. Dr. Nadav Ilani explains the paradox: cannabis can both relieve and trigger nausea.

Israeli doctors are reporting an increase in cases of a rare disorder—cannabinoid hyperemesis syndrome (CHS)—associated with long-term cannabis use. In the US, hospitalizations for this syndrome rose by 16% over the past year, drawing attention from specialists, including those in Israel. The syndrome manifests as episodes of severe nausea, vomiting, and abdominal discomfort. The most notable increase in cases is among young people aged 15–24. Gastroenterologist Dr. Nadav Ilani explains that the link between cannabis and vomiting may seem paradoxical, as cannabis-based medications are sometimes used to relieve nausea; however, with prolonged use, cannabis can trigger episodes of nausea and vomiting. The mechanisms of the syndrome are not fully understood; scientists suspect excessive stimulation of certain body systems and dysregulation in the brain and digestive tract. A possible genetic component is also being considered. In the early stage, the syndrome may cause morning nausea and abdominal pain, and the person often continues using cannabis, mistakenly believing it will alleviate symptoms. Hyperemesis involves frequent vomiting, severe nausea, abdominal pain, decreased appetite, weight loss, and dehydration. For some, a hot shower provides temporary relief.

Israelis Warned of Spread of New Syndrome