There is no given name for the study of marijuana. Marijuana is a plant that is commonly abused as a drug. The Latin name for marijuana is cannabis while the botanical name is cannabis sativa.

According to the Bible, we are to take care of our bodies as the temples of the Holy Spirit. So we should not be ingesting anything dangerous. Three cannabis joints are equivalent to 20 tobacco cigarettes according to a study by the British Lung Foundation.

There is no commonly accepted term to describe the study of marijuana. Botanists study plants and pharmacologist study the development of drugs. Specifically, phanergamology is the study of plants that produce flowers as the Cannabis genus does. All of these fields fall under the category of Biochemistry. If you want to study marijuana, you would have to pick a concentration and then pick a specific subject to study, such as marijuana.

Cannabis shouldn't be capitalized unless it's at the beginning of a sentence because it's not a proper noun.

Cannabis does need to be capitalized when using its proper taxonomic names, Cannabis sativa, Cannabis indica or Cannabis ruderalis.