Methamphetamine is a highly addictive psychostimulant that affects the central nervous system. It causes the release of neurotransmitters like dopamine and activates the cardiovascular and nervous systems. While it is prescribed to treat conditions like ADHD and obesity in limited cases under the brand name Desoxyn, methamphetamine is more commonly abused as an illegal street drug known as "ice" or "crystal" that produces feelings of euphoria. Long term meth abuse is associated with severe health risks and addiction.