Nausea and Glaucoma are two of the most common afflictions that patients use cannabis to alleviate. It sounds counterintuitive, but pot works better than standard anti-nausea drugs in alleviating the nausea and vomiting caused by chemotherapy, according to a 2008 review of cannabinoid drugs synthesized in the lab published in the European Journal of Cancer Care. - Elvy Musikka and Rebecca Forbes pictured