Methamphetamine—known as “meth”—is a very addictive stimulant drug.
Also known as: “Speed” “Chalk” “Tina" “Ice” “Crank” “Glass” and “Fire”
Methamphetamine is a manmade, white, bitter-tasting powder. Sometimes it's made into a white pill or a shiny, white or clear rock called a crystal. Most of the meth used in the United States comes from “superlabs”—big illegal laboratories that make the drug in large quantities.
Regular use of methamphetamine causes chemical and molecular changes in the brain. The activity of the dopamine system changes, causing problems with movement and thinking. Some of these changes remain long after methamphetamine use has stopped. Although, some may reverse after a person is off the drug for a long period of time, perhaps more than a year, methamphetamine may destroy nerve cells that produce dopamine and another neurotransmitter called serotonin.