It has been suggested that this article or section be merged with Bioactivity. (Discuss)

Pharmacological or biological activity is an expression describing the beneficial or adverse effects of a drug on living matter. When the drug is a complex chemical mixture, this activity is exerted by the substance's active ingredient or pharmacophore but can be modified by the other constituents. The main kind of biological activity is a substance's toxicity. Activity is generally dosage-dependent and it is not uncommon to have effects ranging from beneficial to adverse for one substance when going from low to high doses. Activity depends critically on fulfillment of the ADME criteria. Wikipedia does not have an article with this exact name. ... Bioactivity refers to the effect of a given agent, such as a vaccine, upon a living organism or on living tissue. ... Pharmacology (in Greek: pharmacon is drug, and logos is science) is the study of how chemical substances interfere with living systems. ... Look up drug in Wiktionary, the free dictionary. ... In biology and ecology, an organism (in Greek organon = instrument) is a complex adaptive system of organs that influence each other in such a way that they function as a more or less stable whole and have properties of life. ... An active ingredient, also active pharmaceutical ingredient (or API), is the substance in drug that is pharmaceutically active. ... A pharmacophore is a three-dimensional substructure of a molecule that carries (phoros) the essential features responsible for a drugs (pharmacon) biological activity. ... Look up toxic and toxicity in Wiktionary, the free dictionary. ... Dosage is Collective Souls fourth studio album, released on February 9, 1999. ... ADME is an acronym for Absorption, Distribution, Metabolization, and Excretion, and describes the effectiveness of a pharmaceutical compound within an organism. ...