Is a sympathomimetic drug that acts as a powerful central nervous system stimulant. Amphetamine use produces many effects including increased energy, increased alertness, euphoria and decreased appetite. The effects of amphetamine have been linked to mechanisms of action involving numerous neurotransmitters including dopamine, serotonin, norepinephrine and 5-hydroxytryptamine (5-HTP).

Amphetamine is available in several pharmaceutical formulations (Adderall, Dexedrine, Dextrostat, etc) for the treatment of certain medical conditions including ADHD, narcolepsy and chronic fatigue syndrome. Several street forms of amphetamine are also common in parts of the world. Both pharmaceutical and street forms of amphetamine have a very high potential for abuse and carry significant risk of addiction.

Ritalin a drug in the amphetamine class which is a common drug sought by college students than among those not in college, quite possibly explained by college students using Ritalin to stay awake late at night to finish assignments or study for tests.

Ritalin is prescribed for treating narcolepsy (uncontrollable sleepiness), and attention-deficit hyperactivity disorder (ADHD). Common side effects of Ritalin include nervousness, agitation, anxiety, insomnia, loss of appetite, nausea, vomiting, dizziness, palpitations, headache, increased heart rate, increased blood pressure, and psychosis.

Meth, or methamphetamine, is a powerfully addictive stimulant that is both long-lasting and toxic to the brain. Its chemistry is similar to speed (amphetamine), but meth has far more dangerous effects on the body's central nervous system.

Meth has a high potential for abuse and may lead to severe psychological or physical dependence and even death.

Meth works by severely changing the way the brain functions. First, it increases the release of the brain chemical dopamine. At the same time, it blocks the brain from absorbing the dopamine released. Studies show that alterations in the brain’s dopamine system are associated with reduced motor skills and impaired verbal skills.

Like cocaine and speed, even small amounts of meth can cause a rapid and/or irregular heartbeat, increased blood pressure and elevated body temperatures. These symptoms, especially when meth is taken at high doses, can cause death from stroke, heart attack or organ failure due to overheating.

Meth is a highly addictive drug. Repeated use can negatively affect your body and brain. Abuse can cause extreme weight loss, dental problems (“meth mouth”), and lead to sores and scabs on your skin and face. Chronic meth abusers can become anxious and violent. Meth users often display a range of psychotic behaviors, including paranoia, hallucinations, and delusions. One of the most common meth delusions is the feeling of insects crawling under the skin.