Identifying Stimulants in Psychoactive Drugs

In the context of psychoactive drugs, it's important to differentiate between depressants, stimulants, and hallucinogens. Each category of drug affects the brain and body in distinct ways. For instance, depressants generally slow down neural activity and can induce relaxation, while stimulants increase alertness and energy. Hallucinogens can alter perception and affect one's sense of reality.

Considering these effects, which of the following drugs is classified as a stimulant and is commonly known to increase levels of dopamine within the brain?