What is an example of a stimulant drug classified under controlled substances?

Methamphetamine is an example of a stimulant drug classified under controlled substances due to its potent effects on the central nervous system. Stimulants are substances that increase brain activity, leading to increased alertness, attention, and energy. Methamphetamine specifically boosts the release of dopamine, a neurotransmitter linked to pleasure and reward, which can result in heightened euphoria and increased energy levels.

Controlled substances like methamphetamine are regulated due to their potential for abuse and addiction, and they can lead to serious health issues when misused. Understanding this helps to differentiate it from drugs that fall into other categories, such as opioids or hallucinogens, which have different effects and classifications.