What are the three types of drug actions?

The three types of drug actions refer to how drugs interact with biological systems to produce effects. The correct group identifies the general classifications of drugs based on their primary effects on the central nervous system and overall physiological function.

In this context, the terms stimulant and depressant describe drugs that increase or decrease activity within the body, respectively. Stimulants enhance alertness, energy, and attention, while depressants slow down brain activity and can create feelings of relaxation or sedation. The term irritant is less commonly used to describe a type of drug action but can refer to substances that provoke a strong reaction in the body, often leading to discomfort or adverse effects.

Understanding these categories helps to identify the intended effects and potential side effects of various medications or substances, which is crucial in both medical and law enforcement contexts.