As of January 2017, 29 states have legalized medical marijuana. However, marijuana remains a Schedule l substance under the Controlled Substances Act. Substances in Schedule l are determined by the Food and Drug Administration (FDA) to have no medical use, and states that allow the use of marijuana for medical use violate federal law.
Although the use of marijuana for medicinal purposes is often touted as one reason for the legalization of marijuana, little is known about the long-term impact of the use of medical marijuana particularly on people with health- and/or age-related vulnerabilities – such as individuals suffering from cancer, AIDS, cardiovascular disease, multiple sclerosis, or other neurodegenerative diseases. (See https://www.drugabuse.gov/publications/marijuana/marijuana-safe-effective-medicine) Further research is needed to determine whether people whose health has been compromised by disease or its treatment (e.g., chemotherapy) are at greater risk for adverse health outcomes from marijuana use.
The FDA believes that scientifically