Some types of amphetamines are found in the dextroamphetiamines, methylphenidate and atomoxetine classes, says Drugs.com. These types of amphetamines are generally used to treat attention deficit hyperactivity disorder, or ADHD.
Amphetamines that belong to the class of central nervous system stimulants and the class of adamantane antivirals and dopaminergic antiparkinsonism agents are used for fatigue and narcolepsy, according to Drugs.com. Narcolepsy is a condition in which the patient falls asleep suddenly and uncontrollably.
Amphetamines that are classed as anorexiants, peripherally acting antiobesity agents, gonadotropins, incretin mimetics and H2 antagonists are used to treat obesity. Other types of amphetamines used to treat obesity are central nervous system stimulants and carbonic anhydrase inhibitor anticonvulsants.
Central nervous system stimulants increase the patient's alertness and physical activity, claims Drugs.com. They also allow the patient to pay attention for longer periods of time. Methylphenidate and atomoxetine are CNS stimulants. Scientists don't know exactly how these CNS stimulants work.
Anorexiants affect the parts of the brain that control the patient's appetite, claims Drugs.com. They stimulate the limbic system and the hypothalamus, which gives the patient a feeling of satiety. Carbonic anhydrase inhibitor anticonvulsants suppress carbonic anhydrase, which is an enzyme. This type of amphetamine is also used to treat glaucoma and epilepsy.
Incretin mimetics prevent high blood sugar in the patient by bonding to the GLP-1 receptors, says Drugs.com. These receptors normally accept hormones such as glucagon-like peptide 1.