Texas Commission on Law Enforcement (TCOLE) Practice Exam

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Which of the following is not one of the six major categories of drugs?

Stimulants
Depressants
Dilutants
Psychedelics

The correct answer is: Dilutants

The correct answer is "Dilutants" because it does not fall within the recognized categories of drugs commonly classified in substance abuse studies. The six major categories typically include stimulants, depressants, opioids, hallucinogens (or psychedelics), cannabis, and inhalants. Stimulants are drugs that increase alertness and energy; depressants slow down the central nervous system; hallucinogens alter perception and can lead to sensory distortions. Each of these categories is built on pharmacological principles and effects on the human body. On the other hand, “dilutants” is not a recognized category in this context, making it the outlier among the provided options.