A nurse in an emergency department is assessing a client who reports recently using cocaine. Which of the following clinical manifestations should the nurse expect?

A. Cocaine is a stimulant and increases sympathetic nervous system activity, which typically results in tachycardia (increased heart rate), not bradycardia (slowed heart rate). B. Cocaine use stimulates the cardiovascular system, leading to elevated blood pressure (hypertension), which is a common and dangerous effect that requires immediate attention. C. Cocaine is a stimulant, so it typically causes increased energy and alertness, not lethargy, which is more associated with depressant substances. D. Cocaine typically increases body temperature, not decreases it. Hypothermia is more likely with other conditions or substances, such as alcohol or extreme environmental conditions.