Marijuana, a commonly abused drug is linked to a severe form of vomiting syndrome and compulsive bathing behavior. This form of severe vomiting sickness is increasingly recognized with widespread abuse of marijuana. The syndrome usually subsides with strict abstinence from marijuana abuse. Recent research into the neurobiology of cannabis has led to the identification of different receptor types including two specific types that mediate neuropsychiatric and immunologic effects. The exact mechanism leading to generation of these symptoms, why it appears only after several years of marijuana abuse and why compulsive hot showering behavior relieves the symptoms is still under scientific investigation.
For more details: www.sciencedaily.com/releases/2009/03/090320102130.htm