Methamphetamine is a drug that strongly activates certain systems in the brain. It is closely related chemically to amphetamine, but the central nervous system effects of methamphetamine are greater. Both drugs have some medical uses, primarily in the treatment of obesity, but their therapeutic use is limited. Other CNS effects include irritability, insomnia, confusion, tremors, convulsions, anxiety, paranoia, and aggressiveness. Hyperthermia and convulsions can result in death.
Ice is clear chunky crystals that resemble ice.
All forms of methamphetamine are extremely dangerous and induce long-lasting, debilitating effects. Methamphetamine has a high potential for abuse and dependence. Side effects of methamphetamine use include irritability, nervousness, insomnia, nausea, hot flashes, dryness of the mouth, sweating, palpitations, and hypertension. Excessive doses can produce mental confusion, severe anxiety, and paranoia. Continued moderate to chronic use may lead to physical dependence and even death.