How do stimulants like cocaine and amphetamines affect the body?

• A. They decrease heart rate and blood pressure
• B. They impair cognitive function and coordination
• C. They increase heart rate, blood pressure, and lead to heightened alertness
• D. They cause drowsiness and sedation

Answer: (C)

Stimulants such as cocaine and amphetamines primarily act by increasing the levels of certain neurotransmitters in the brain, particularly dopamine and norepinephrine. This action results in various physiological effects that are characteristic of stimulant drugs. One of the most significant outcomes of using stimulants is an increase in heart rate and blood pressure, which occurs due to the activation of the sympathetic nervous system.

Alongside the cardiovascular effects, stimulants are known to enhance alertness and energy levels, making individuals feel more awake and focused. This heightened state of alertness is one reason why stimulants are sometimes misused. The increase in psychomotor activity can also lead to reduced feelings of fatigue and diminished perception of pain, further contributing to the stimulant's stimulating effects on the body.

In contrast, options that suggest a decrease in heart rate and blood pressure, impairing cognitive function, or causing drowsiness and sedation do not accurately reflect the pharmacological effects of stimulants. These effects are typically associated with depressants or sedatives rather than stimulants like cocaine and amphetamines.