Clinical Nutritionist Practice Test 2026 - Free Practice Questions and Study Guide

Amphetamines are stimulant drugs that primarily affect the central nervous system. Their mechanism of action includes increasing the release and inhibiting the reuptake of neurotransmitters such as dopamine, norepinephrine, and serotonin. This increased activity in the brain can lead to a suppression of appetite, resulting in decreased food intake.

In clinical settings, amphetamines are sometimes prescribed for obesity and attention deficit disorders, reflecting their capacity to curtail appetite and support weight loss efforts. This pharmacological property is why the correct answer indicates that amphetamines decrease food intake. Their potential to suppress hunger signals and promote feelings of fullness can make food less appealing, leading to reduced caloric consumption.