With recent legalization of<unk>  and recreational marijuana in many states in the US, physicians are often facing questions from their patients regarding the potential harmful effects of this drug on their body. Once known as an illegal substance, marijuana is now legalized for medicinal purposes in many states and for recreational use in Alaska, Washington and Colorado.
Marijuana is made from drying and shredding the leaves and flowers of the plant Cannabis sativa. Tetrahydrocannabinol is the active component which primarily acts on the cannabinoid receptors I and II in the central nervous system and the periphery, respectively. In the United States, it is mostly used in its inhalational form via smoking and is the most commonly used illicit drug.<unk>  marijuana plays a crucial role in the management of chronic pain syndromes, glaucoma, multiple sclerosis, HIV especially AIDS associated anorexia and wasting syndrome and epilepsy. With clinical evidence backing the use of marijuana in population with chronic, debilitating conditions, the widespread legalization raises concerns over its safety.
Medical cannabis
Cannabis 
Methamphetamine
Cyclochlorotine
3,4-Methylenedioxyamphetamine
Detomidine
Phencyclidine
Nicotine