Which drug is commonly associated with the category of depressants?

Valium, known generically as diazepam, is commonly associated with the category of depressants because it belongs to the class of benzodiazepines. Depressants are substances that reduce the activity of the central nervous system, leading to effects such as drowsiness, relaxation, and decreased inhibition. Benzodiazepines like Valium are often prescribed to treat anxiety, insomnia, and muscle spasms because of their calming effects on the body.

In contrast, cocaine is a stimulant that increases alertness and energy; methamphetamine is also a stimulant that can lead to increased activity and euphoria. Tabernadine (likely referring to terfenadine), although an antihistamine, does not primarily act as a depressant and has been largely discontinued due to safety concerns. Thus, Valium stands out in this context as the drug that fits the depressant category.