For many patients in Colorado, medical marijuana use can be the most effective treatment for nausea available. Medical marijuana can help reduce nausea and actually stimulate the appetite, reducing the risk of weight loss in patients with such diseases as AIDS and cancer. In a study in 2007 where scientists surveyed HIV-positive marijuana smokers, the drug was shown to actually increase caloric intake and assist with weight gain. For those patients who do not respond to traditional forms of nausea medication, the use of medical marijuana has been shown to be not only a cost effective alternative, but symptoms actually improved to a greater degree as opposed to the use of clinical medicals. In a study by the New York State Journal of Medicine, 56 patients who did not respond to traditional medicine showed improvement when the use of medical marijuana was introduced.