The Cannabis plant has a history of medicinal use dating back thousands of years across many cultures. Medical cannabis, or medical marijuana, can refer to the use of cannabis and its cannabinoids to treat disease or improve symptoms of such diseases. An Irish physician, William Brooke O’Shaughnessy, is credited with introducing the therapeutic use of cannabis to Western medicine, to help treat muscle spasms, stomach cramps and general pain. Albert Lockhart and Manley West began studying in 1964 the health effects of traditional cannabis use in Jamaican communities. They developed, and in 1987 gained permission to market one of the first cannabis extracts. In the 1970s, a synthetic version of THC was produced and approved for use in the United States as the drug. Many different cannabis strains are collectively called “medical cannabis.” Since many varieties of the cannabis plant and plant derivatives all share the same name, the term “medical cannabis” is ambiguous and can be misunderstood. A Cannabis plant includes more than 400 different chemicals, of which about 70 are cannabinoids. In comparison, typical government-approved medications contain only 1 or 2 chemicals. In 2016, under an executive order from governor Alejandro García Padilla, Puerto Rico started a progressive step to allow medical cannabis to be used as complementary therapies for chronic conditions management.