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Created page with "== Introduction == Pharmacology is the branch of biology concerned with the study of drug action. A drug can be broadly defined as any man-made, natural, or endogenous molecule which exerts a biochemical or physiological effect on the cell, tissue, organ, or organism. More specifically, it is the study of the interactions that occur between a living organism and chemicals that affect normal or abnormal biochemical function. Image:Detail-40807.jpg|thumb|ce..."
