Alters the effects of the neurotransmitters glutamate and GABA. Probably increases activity in the dopamine system involved in motivation and learning. Develops due to increased processing in the liver and changes to receptors in the brain.

Which drugs increase dopamine?

Research has shown that the drugs most commonly abused by humans (including opiates, alcohol, nicotine, amphetamines, and cocaine) create a neurochemical reaction that significantly increases the amount of dopamine that is released by neurons in the brain's reward center.

Is dopamine a stimulant or depressant?

Stimulants such as dextroamphetamine (Dexedrine) and methylphenidate (Ritalin) have chemical structures that are similar to key brain neurotransmitters called monoamines, which include norepinephrine and dopamine. Stimulants increase the levels of these chemicals in the brain and body.