Cannabis can also help treat the uncomfortable side effects of chemotherapy and cancer. The most common effects include nausea, anxiety, depression, pain, and loss of appetite. “Medical cannabis, if you think about tit, it’s the only botanical medicine that can help nausea, increase appetite, decrease pain, and elevate mood,” explains Dr. Chin. She also adds that a great deal of patients who are taking chemotherapy as part of their treatment regimen live in a cannabis-friendly state, and are using MMJ for relief.