Which of the following is a typical physical effect of stimulant use?

Stimulant use is associated with an increase in the activity of the central nervous system, which leads to several physiological responses in the body. One of the hallmark effects of stimulants, such as amphetamines or cocaine, is an increased heart rate, known as tachycardia. This occurs because stimulants enhance the release of neurotransmitters like norepinephrine and dopamine, which stimulate the heart and increase cardiovascular activity.

In contrast, a decreased heart rate would imply a calming effect, which is not characteristic of stimulants. Likewise, low blood pressure generally corresponds with a relaxing or depressant effect rather than the heightened arousal brought on by stimulants. Finally, decreased energy levels are more in line with depressants, which slow down bodily functions rather than stimulate them. Thus, increased heart rate accurately reflects a typical physiological response to stimulant use.