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Pharmacology is the science of drugs and medications, [1] including a substance's origin, composition, pharmacokinetics, pharmacodynamics, therapeutic use, and toxicology. More specifically, it is the study of the interactions that occur between a living organism and chemicals that affect normal or abnormal biochemical function. [ 2 ]
In pharmacology, the area under the plot of plasma concentration of a drug versus time after dosage (called “area under the curve” or AUC) gives insight into the extent of exposure to a drug and its clearance rate from the body.
Illustration showing the hepatic portal vein system. The first pass effect (also known as first-pass metabolism or presystemic metabolism) is a phenomenon of drug metabolism at a specific location in the body which leads to a reduction in the concentration of the active drug before it reaches the site of action or systemic circulation.
In pharmacology, the term mechanism of action (MOA) refers to the specific biochemical interaction through which a drug substance produces its pharmacological effect. [2] A mechanism of action usually includes mention of the specific molecular targets to which the drug binds, such as an enzyme or receptor . [ 3 ]
Topics of pharmacodynamics. Pharmacodynamics (PD) is the study of the biochemical and physiologic effects of drugs (especially pharmaceutical drugs).The effects can include those manifested within animals (including humans), microorganisms, or combinations of organisms (for example, infection).
In addition to 24 sections covering medical topics, it includes a pharmacology section listing drugs by generic and brand name, a list of drug interactions and a pill identifier, a News and Commentary section, videos on procedures and examination techniques, quizzes and case histories, clinical calculators, conversion tables and other resources ...
Therapeutic drug monitoring (TDM) is a branch of clinical chemistry and clinical pharmacology that specializes in the measurement of medication levels in blood.Its main focus is on drugs with a narrow therapeutic range, i.e. drugs that can easily be under- or overdosed. [1]
The main aim of clinical pharmacology is to generate data for optimum use of drugs and the practice of 'evidence-based medicine'. Clinical pharmacologists have medical and scientific training that enables them to evaluate evidence and produce new data through well-designed studies.
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