methamphetamine, potent and addictive synthetic stimulant drug that affects the central nervous system (the spinal cord and brain). Methamphetamine is prescribed for the treatment of certain medical conditions, including attention-deficit/hyperactivity disorder (ADHD), narcolepsy, and obesity. Methamphetamine is a lab-made (synthetic) stimulant with high addiction potential. When sold as shiny bluish-white rocks or crystals, it may be called “crystal meth,” “Tina,” or “ice.” Methamphetamine’s short-term effects typically include feelings of euphoria and increased alertness and energy. l-METH, a vasoconstrictor, is the active constituent of the Vicks Inhaler decongestant (Procter & Gamble, Cincinnati, OH), an over-the-counter product containing about 50 mg of the drug (Smith et al., 2014). How widespread is meth use in the U.S.? Federal data on use, addiction, overdose deaths, demographics, and the gap between people who need treatment and get it. Learn more about the short- and long-term effects associated with meth use, symptoms of meth addiction, and treatment options. Crystal meth is the common name for crystal methamphetamine, a strong and highly addictive drug that affects the central nervous system. There is no legal use for it. Also called “ice” or. Stimulant that speeds up body’s system that comes as pill or powder. Available in prescription as Desoxyn® to treat obesity and ADHD. Crystal meth resembles glass fragments and is an illegally altered version of the prescription drug that is cooked with over-the-counter drugs in meth labs. Meth is a stimulant drug that can cause brief but intense euphoria and poses a high risk of addiction. Learn its effects and how to get treatment. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Methamphetamine is used to treat attention deficit hyperactivity disorder (ADHD). Methamphetamine is also to treat obesity in people who have not lost weight with diets or other treatments. Learn about methamphetamine drug use and how long the high, short-term effects, long-term effects, and withdrawal from meth can last.