Medical Cannabis Shop will still bring you the basics of understanding Medical Marijuana. Medical marijuana is the use of the leaves, flowers, and buds of the hemp plant cannabis as a treatment for diseases or symptoms. The healing properties of marijuana are due to its high cannabidiol (CBD) content (the non-psychoactive component of cannabis that may be beneficial in treating pain, epileptic seizures and possibly psychoses). Marijuana also contains tetrahydrocannabinol (THC), a molecule that can stimulate appetite, decrease nausea, reduce pain and produce a psychoactive effect.