The Cannabis plant has a history of medicinal use dating back thousands of years across many cultures.
Medical cannabis can be administered using a variety of methods, including liquid tinctures, vaporizing or smoking dried buds, eating cannabis edibles, taking capsules, using lozenges, dermal patches or oral/dermal sprays.
Synthetic cannabinoids are available as prescription drugs in some countries; examples include: dronabinol and nabilone.
Recreational use of cannabis is illegal in most parts of the world, but the medical use of cannabis is legal in certain countries, including Austria, Canada, Czech Republic, Finland, Germany, Israel, Italy, the Netherlands (where it is also legal recreationally), Portugal and Spain.
Australia has passed laws to allow the use of marijuana for medical and scientific purposes in some states.