Pharmacology is a branch of pharmaceutical sciences that is concerned with the look at of drug or medicine motion, in which a drug may be extensively or narrowly defined as any man-made, natural, or endogenous (from inside the frame) which exerts a biochemical or physiological effect at the mobile, tissue, organ, or organism (once in a while the phrase pharmacon is used as a time period to embody those endogenous and exogenous bioactive species). More in particular, it's far the have a look at of the interactions that arise between a living organism and chemical substances that affect regular or strange biochemical characteristic. If substances have medicinal residences, they're taken into consideration prescription drugs.