Vol. 7, Issue 2, Part B (2025)

In the brain, dopamine (DA) is a crucial neurotransmitter. It has been proved in several studies to regulate limbic and motor functioning. Cognitive abnormalities can result from selective lesions of dopaminergic neurons in rats or primates, according to experimental research. This is particularly true when the mesocorticolimbic component of the dopaminergic systems is changed. The trials' data also revealed notable changes in attentional processes, which begs the question of whether DA directly controls attention. Given that the frontal lobe and basal ganglia are the primary sites of dopaminergic impact, It has been suggested that cognitive deficiencies reflect changes in subcortical brain regions that are closely connected to cortical areas, rather than being solely due to a lack of dopaminergic transmission. Stimulant use disorders remain a significant public health concern, with no approved pharmacotherapies available. The monoamines dopamine (DA), serotonin (5-HT), and norepinephrine (NE) are all elevated at the synaptic level by stimulants. Although increased dopamine (DA) in the reward circuitry is the main cause of the pleasant effects of stimulants, DA stimulation by itself does not completely explain the rewarding qualities of stimulants. Arousal, attention, mood control, learning, memory, and the stress response are all functions of the noradrenergic system, which uses NE as its primary chemical messenger.