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Pharmacology (from Greek φάρμακον, pharmakon, "poison" in classic Greek; "drug" in modern Greek; and -λογία, -logia "study of", "knowledge of") is the branch of medicine and biology concerned with the study of drug action. thre are two main dvsions of pharmacology : 1) pharmacokinetics:           it is the study of what the body dose to the drug.            it nclude ADME 2) pharmacodynamics: it include the study of what the drug does to the body.

absorption it is the process of movement of drug from site of administration to the systamic circulation.