DRUGS
Any molecule that, when taken, alters the physiology or psychology of an organism qualifies as a drug. Pharmaceutical medications may be used for a short period or on regularly regular basis to treat chronic illnesses. Drug classes are sets of related medications that have comparable chemical structures, the same mechanism of action (binding to the same biological target), and a similar mode of action, and are used to treat the same illness. The most extensively used drug categorization system, the Anatomical Therapeutic Chemical Cla...