Medical cannabis, also known as medical marijuana, is a cannabis plant and active compounds that are prescribed frequently by doctors to their terminally ill patients. Medical cannabis can be smoked or ingested as well as taken in pill form. The active components of medical cannabis are THC and CBD or Cannabidiol, which are each different from the other in various ways, including chemical composition, physical effect, and therapeutic benefit. While there is no precise data on the efficacy of medical cannabis in treating certain diseases, such as cancer or glaucoma, it has been seen that it reduces the painful effects of such ailments. It has also been found to assist people suffering from nausea and vomiting, help prevent seizures, and increase the appetite.