tachyphylaxis

A decrease in the response to an agonist following repeated exposure. Can arise through a variety of mechanisms.
Found on http://www.encyclo.co.uk/visitor-contributions.php

tachyphylaxis

1. <immunology> The rapid immunisation against the effect of toxic doses of an extract or serum by previous injection of small doses. ... 2. <pharmacology> The rapidly decreasing response to a drug or physiologically active agent after administration of a few doses. ... Origin: Gr. Phylaxis = protection ... (16 Dec 1997) ...
Found on http://www.mondofacto.com/facts/dictionary?tachyphylaxis

tachyphylaxis

(tachy- + Gr. phylaxis protection) 1. rapid immunization against the effect of toxic doses of an extract or serum by previous injection of small doses. 2. rapidly decreasing response to a drug or physiologically active agent after administration of a few doses.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio85.html

tachyphylaxis

tachyphylaxis 1. Rapid immunization to a toxic dose of a substance by previously injecting tiny doses of the same substance.2. Rapid appearance of progressive decrease in response following repetitive administration of a pharmacologically or physiologically active substance. 3. Also known as tachysynethis.
Found on http://www.wordinfo.info/words/index/info/view_unit/2663/4

tachyphylaxis

Type: Term Pronunciation: tak′i-fī-lak′sis Definitions: 1. Rapid appearance of progressive decrease in response to a given dose after repetitive administration of a pharmacologically or physiologically active substance.
Found on http://www.medilexicon.com/medicaldictionary.php?t=89536

Tachyphylaxis

Tachyphylaxis (Greek ταχύς, tachys, `rapid`, and φύλαξις, phylaxis, `protection`) is a medical term describing an acute (sudden) decrease in the response to a drug after its administration. Can occur after an initial dose or after a series of small doses. Increasing the dose of the drug may be able to restore the original response....
Found on http://en.wikipedia.org/wiki/Tachyphylaxis
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