Which class of drugs is known for increasing alertness and energy?

Stimulants are a class of drugs that are specifically recognized for their ability to enhance alertness, increase energy, and elevate mood. These substances work by increasing the activity of certain neurotransmitters in the brain, such as dopamine and norepinephrine. As a result, users often experience heightened focus, improved attention, and a surge in physical and mental energy.

This class encompasses various drugs, including caffeine, amphetamines, and cocaine, all of which are widely known for their stimulating effects. The mechanisms by which stimulants operate lead to an increased heart rate and heightened awareness, making them distinctly different from other classes of drugs that have sedative or hallucinatory properties.