Cannabis, otherwise also called as marijuana is a psychoactive drug from the Cannabis plant used primarily for medical or recreational purposes. Cannabis has both mental and physical effects. The main psychoactive component of cannabis is tetrahydrocannabinol(THC). Medical marijuana, is the use of cannabis and its cannabinoids to treat disease or relaxation symptoms. Cannabis is consumed in many different ways like smoking, Vaporizer, Cannabis tea, Edibles and Capsules. Cannabis has not been reported to cause fatal overdose in humans. Cannabis Extracts such as hashish and hash oil typically contain more THC than high potency cannabis infructescences. The use of medical cannabis support its use for AIDS wasting syndrome, epilepsy, rheumatoid arthritis, and glaucoma.