Methamphetamine is a highly addictive drug with potent central nervous system stimulant properties. In the 1960s, methamphetamine pharmaceutical products were widely available and extensively diverted and abused. The 1971 placement of methamphetamine into Schedule II of the Controlled Substance Act (CSA) and the removal of methamphetamine injectable formulations from the United States market, combined with a better appreciation for its high abuse potential, led to a drastic reduction in the abuse of this drug. However, a resurgence of methamphetamine abuse occurred in the 1980s and it is currently considered a major drug of abuse. The widespread availability of methamphetamine today is largely fueled by illicit production in large and small clandestine laboratories throughout the United States and illegal production and importation from Mexico. In some areas of the country (especially on the West Coast), methamphetamine abuse has outpaced both heroin and cocaine.