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medical terminology


an extreme allergic reaction that can lead to respiratory distress, circulatory collapse and death.


a substance that interferes with or opposes the action of a drug

brand name

the trade or proprietary name of a drug, a registered trademark of the manufactures; written with an initial capital letter


a factor that makes the use of a drug undesirable or dangerous


a substance that alters body function


the power to produce a specific result; effectiveness

generic name

the nonpropietary name of a drug; that is, a name that is not privately owned or trademarked; usually a simplified version of the chemical name; not capitalized


another name for herbal medicine


increased potency created by two drugs acting together


written and signed order for a drug with directions for its administration

side effect

a result of drug therapy that is unrelated to or an extension of its intended effect; usually applies to an undesirable effect of treatment

substance dependence

a condition that may result from chronic use of a drug, in which a person has chronic or compulsive need for a drug regardless of its adverse effects; dependence may be psychological or physical


combined action of two or more drugs working together to produce an effect greater than any of the drugs could produce when acting alone. also called SYNERGISM


a condition in which chronic use of a drug results in loss of effectiveness and the dose must be increased to produce the original response


a condition that results from abrupt cessation or reduction of a drug that has been used regularly

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