Drugs A to Z gives basic information on drugs with addictive potential, including how they are used, how they make people feel, and their health effects, including risk for substance use disorder. Treatment options for substance use disorders related to these drugs are also included. Find detailed information on prescription drugs, OTC medications, vitamins and dietary supplements, including their uses, side effects, and interactions. Learn the most commonly used drugs in the United States as of 2025, according to the most recent National Survey on Drug Use and Health. Drugs@FDA Find information about most FDA-approved prescription, generic, and over-the-counter drug products. Drug Shortages Find information about drug shortages caused by manufacturing and. A group of drugs will share a similar chemical structure, have the same mechanism of action or the same related mode of action, or target the same illness or related illnesses. [5][6] The Anatomical Therapeutic Chemical Classification System (ATC), the most widely used drug classification system, assigns drugs a unique ATC code, which is an. Medications and prescription drug information for consumers and medical health professionals. Online database of the most popular drugs and their side effects, interactions, and use. Drugs.com is the most popular, comprehensive and up-to-date source of drug information online. Providing free, peer-reviewed, accurate and independent data on more than 24,000 prescription drugs, over-the-counter medicines & natural products. Drugs & Medications A to Z Detailed and accurate information is provided on over 24,000 prescription and over-the-counter medicines for both consumers and healthcare professionals. Look up information about prescription drugs, over-the-counter medications, herbs, vitamins and supplements. Information about FDA-approved brand name and generic prescription and over-the-counter human drugs and biological therapeutic products.