Regional ER doctors grapple with a rise in severe cannabis-induced illness

Key Points:

• Emergency departments in the Philadelphia region are seeing a surge in cannabinoid hyperemesis syndrome (CHS) cases, a condition causing severe nausea and vomiting in longtime cannabis users, linked to the increased potency and accessibility of marijuana.
• CHS is characterized by intense nausea relieved temporarily by hot showers or baths, and symptoms often resist typical anti-nausea medications, requiring treatments such as antipsychotic injections and topical capsaicin cream.
• The rise in CHS cases correlates with legalization and the availability of high-THC cannabis products, with some hospitals reporting a three-fold increase in cases over two years and studies indicating about 30% of chronic users may develop the syndrome.
• Patients often struggle to accept the diagnosis due to cannabis's known anti-nausea effects at low doses, but prolonged heavy use of potent cannabis can cause CHS, which may require months of abstinence for symptom resolution.
• Researchers are investigating the exact causes of CHS, including genetic factors and cannabis strains, while doctors emphasize that quitting cannabis is the only effective cure to prevent recurrent episodes and emergency visits.