Unveil the world of drugs: from depressants to opioids, explore the types, effects, and risks. Dive into the realm of substances. A drug is any chemical substance that affects the functioning of living things and the organisms (such as bacteria, fungi, and viruses) that infect them. Find detailed information on prescription drugs, OTC medications, vitamins and dietary supplements, including their uses, side effects, and interactions. The meaning of DRUG is a substance used as a medication or in the preparation of medication. How to use drug in a sentence. Medscape's Drug Interaction Checker helps you build safer, more effective treatment plans by quickly identifying potential interactions between medications, supplements, and even common foods. 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 information about drug shortages caused by manufacturing and quality problems, delays, and discontinuations. Find information about finished drug products, unfinished drugs, and compounded. Recreational drug use is the use of a drug (legal, controlled, or illegal) with the primary intention of altering the state of consciousness through alteration of the central nervous system in order to create positive emotions and feelings. Use our drug interaction checker to find potentially harmful drug, food, and alcohol interactions. Type a drug name in the box above to get started. Not all drugs interact, and not every interaction means you must stop taking one of your medications. 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.