Contrary to popular belief that marijuana is not addictive, long-term marijuana users will typically experience withdrawal when they stop using the drug.
Since the 1960s amphetamine use has been popular among many youth subcultures in Britain and other parts of the world as a recreational drug.
Studies of pregnant mothers who use amphetamines during pregnancy indicate that the newborn infants experience withdrawal symptoms after birth.
The States which have the highest rates of past year marijuana use are mostly in the West (five States) and the Northeast (four States).