Clinical Data of the Effects of Marijuana

Marijuana is a dry and odorous, green or brown plant derived from the hemp plant that goes by the scientific name Cannabis sativa. In a more concentrated form marijuana is called hashish, and as a sticky black liquid it is known as hash oil. The main psychoactive chemical in marijuana is delta-9-tetrahydrocannabinol, or THC (National Institute on Drug Abuse). The use of marijuana and the effects of THC on humans has been a heated debate for decades.