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11/20/2008
Thursday morning
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| Study of the factors that influence the movement of drugs throughout the body is called pharmacokinetics, which includes the absorption, distribution, localization in tissues, biotransformation, and excretion of drugs. The study of the actions of the drugs and their effects is called pharmacodynamics. Before a drug can be effective, it must be... |
| in merchandising, retail store that sells products at prices lower than those asked by traditional retail outlets. Some, like department stores, offer wide assortments of goods; others specialize in such merchandise as jewelry, electronic equipment, or electrical appliances. Food stores also have been operated on the discount principle. |
| any drug that mimics the action of the neurotransmitter acetylcholine. See cholinergic drug. |
| any chemical substance that affects the functioning of living things and the organisms (such as bacteria, fungi, and protozoans) that infect them. Pharmacology, the science of drugs, deals with all aspects of drugs in medicine, including their mechanism of action, physical and chemical properties, metabolism, and therapeutics and prophylaxis. |
| The purpose of using drugs is to relieve symptoms, treat infection, reduce the risk of future disease, and destroy selected cells such as in the chemotherapeutic treatment of cancer. The best treatment, however, may not require a drug at all. Recognizing that no effective medication exists is just as important as knowing which one to select. |
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