Drugs

Pharmacology Drug Classification—PDF Free Download

Published: October 13, 2022

Updated: July 16, 2025

Drugs can be grouped together in different ways—by the way they affect the body, how they are used, or where they are prescribed and controlled. It’s valuable to understand the pharmacological classification of drugs, and specifically the risks and side effects. Additionally, it helps recognize addiction in loved ones. There is a wide range of substances, and unfortunately, more people struggle with substance use disorders every day. Although addiction can