Marijuana has many possible medical uses. Positive effects are claimed for ailments such as cancer, aids, and glaucoma. Aids can cause a loss of appetite known as the "wasting syndrome" which can lead to drastic weight loss and weakness. Chemotherapy used in the treatment of cancer causes nausea resulting in an inability to keep down food. Marijuana's healing nature for these two illnesses is a result of it's ability to increase a person's appetite as well as releiving nausea allowing a patient to regain weight. Marijuana reportedly helps glaucoma patients by reducing occular pressure which can cause damage to the eye.