Less commonly, cannabis has been used in the treatment of alcoholism and addiction to other drugs such as heroin and the prevention of migraines. Cigarettes and alcohol have no known medical values.
In the 1980s six states' health departments performed studies on the efficacy of marijuana. Tests conducted in New Mexico with 250 patients showed that Marijuana is far superior to the best available drug, Compazine, and smoked marijuana is clearly superior to oral THC. The report stated, "More than ninety percent of the patients who received marijuana reported significant or total relief from nausea and vomiting". No major side effects were reported.
In the New York study, conducted in three hospitals with 199 patients, Marijuana succeeded, overall at all 3 hospitals, at reducing emesis (nausea and vomiting) in 92.9% of the cases. Marijuana was the most effective antiemetic, or drugs used to treat nausea and/or vomiting.
The Tennessee experiment studied the effect of marijuana on patients who had failed on other antiemetic therapies. 90.4% success was reported for smoked marijuana; 66.7% for oral