What is a symptom commonly associated with stimulant use?

Increased alertness is a symptom commonly associated with stimulant use because stimulants, such as amphetamines and caffeine, work by enhancing the activity of certain neurotransmitters in the brain, particularly norepinephrine and dopamine. This heightened activity leads to improved concentration, reduced fatigue, and an overall sense of heightened awareness. Users often report feeling more energetic and focused, making increased alertness a hallmark effect of stimulant consumption.

In contrast, increased drowsiness is typically linked to depressants rather than stimulants. Weight gain is not a common immediate effect of stimulants, which often suppress appetite instead. Similarly, decreased heart rate is generally associated with other substances; stimulants, in fact, usually result in an increased heart rate due to their stimulating effects on the central nervous system.