Case of cannabinoid hyperemesis syndrome with long-term follow-up.

Long-term cannabis use may be associated with attacks of severe nausea and vomiting, and a characteristic learned behavior of compulsive hot bathing, termed cannabinoid hyperemesis syndrome (CHS). Long-term follow-up and prognosis of CHS have not been reported previously. A 44-year-old Caucasian man with a long history of addiction to marijuana presented with chronic abdominal pain complicated by attacks of uncontrollable vomiting for 16 years. He had a compulsion to take scalding hot showers, as many as 15 times a day, to relieve his symptoms. All previous therapies had been ineffective. However, abstinence from marijuana led to rapid and complete resolution of all symptoms and his compulsive hot showering behavior. He has been followed for nine years, and is still doing well without recurrence of symptoms. Physicians should have a high index of suspicion for this under-recognized condition, as excellent long-term prognosis of CHS can be achieved when abstinence is maintained.