Smack, horse, mud, brown sugar, junk, snow, black tar, Big H, scag, estuffa, stofa, stuff. Heroin is an illegal and highly addictive narcotic derived from the opium poppy. It can be a white, yellowish, gray or brown powder depending on its origin. It is odorless and bitter tasting, and is usually cut with a variety of substances. Suppresses the central nervous system, constricts the pupils of the eyes, and reduces normal thirst and hunger.
Cardiovascular system slows down.
The initial reaction to the drug is usually negative, and includes nausea, sweating, and a general feeling of discomfort. After a few doses, users experience a rush of good feeling followed by drowsiness. Addiction can lead to malnutrition and hepatitis. The use of contaminated syringes can result in AIDS, endocarditis, and hepatitis. Addiction in pregnant women can lead to premature, stillborn, or addicted infants who experience severe withdrawal symptoms.