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Definition of THERAPEUTIC WINDOW
: the range of dosage of a drug or of its concentration in a bodily system that provides safe effective therapy <the narrow therapeutic window…the effect may go from therapeutic to toxic with an increase of just 10 micrograms per milliliter [in] blood concentration—Lisa Davis>
: a usually short time interval (as after a precipitating event) during which a particular therapy can be given safely and effectively <has a narrow therapeutic window: the drug must be given within three hours of a stroke in order to be effective—Genesis Report-RX>
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