Which of the following is a common physical effect of stimulant abuse?

Stimulant abuse is characterized by its effects on the central nervous system, leading to heightened levels of alertness, energy, and arousal. Agitation is a common physical effect of stimulant use, as these substances can increase feelings of restlessness and anxiousness. Individuals may experience irritability and an inability to relax due to the stimulating effects of drugs like amphetamines and cocaine.

In contrast, chronic fatigue is typically associated with the aftermath of stimulant use, rather than during use itself. Weight gain is not a common effect of stimulants; in fact, they often suppress appetite, leading to weight loss in the short term. Calmness is the opposite of what stimulants produce, as they are designed to energize and increase activity levels, which is why agitation aligns perfectly as a result of stimulant abuse.