1(800) 615-1067Methamphetamine, also known as meth or crystal meth, is a highly addictive synthetic stimulant drug that affects the central nervous system. It is classified as a Schedule II drug by the United States Drug Enforcement Administration due to its high potential for abuse and dependence. Methamphetamine is commonly used as a recreational drug for its euphoric effects, but it can also be prescribed by doctors to treat conditions such as attention deficit hyperactivity disorder (ADHD) and obesity.