Which of the following is NOT considered a depressant drug?

Cocaine is classified as a stimulant rather than a depressant. Stimulants are substances that increase activity in the central nervous system, leading to heightened alertness, increased energy, and a sense of euphoria. In contrast, depressants, like GHB and Rohypnol, act to decrease activity in the brain and nervous system, which can induce relaxation, drowsiness, and lower inhibitions. Ketamine, while often used for anesthesia and pain relief, can also have depressant effects, particularly at higher doses. Therefore, identifying cocaine as a stimulant makes it clear it does not belong in the same category as the other options listed, which are depressants.