Anorexiants 

Anorexiants are drugs that act on the brain to suppress appetite. They have a stimulant effect on the hypothalamic and limbic regions, which control satiety. Anorexiants are used as therapy for obesity.

Anorexigenic agents. A major class of medications used in weight treatment is appetite suppressants. Currently available agents affect the neurotransmitters norepinephrine, dopamine, and serotonin in the brain to regulate appetite.

Numerous bioregulators have been described that stimulate or inhibit appetite and feeding behavior. Bioregulators that stimulate appetite and feeding are termed orexic agents (orexin, appetite), whereas those that suppress appetite and feedingare termed anorexic agents.

Analeptic drugs are commonly thought as central nervous system stimulants. Examples of this can include amphetamines used for attention deficit hyperactivity disorder (ADHD), doxapram which is used for respiratory depression and even caffeine that is found in our daily cup of coffee.