noun[mass noun] Medicine
Rapidly diminishing response to successive doses of a drug, rendering it less effective. The effect is common with drugs acting on the nervous system.
- Trebling doses of histamine diphosphate were chosen instead of the usual doubling dose because of the half-life of lidocaine, the number of challenges, and the need to minimize possible tachyphylaxis of the histamine effect.
- The efficacy of calcipotriene is comparable to mid-potency topical corticosteroids; however, it does not cause skin atrophy or tachyphylaxis.
- This spirometric improvement was maintained throughout the 13-week period without any evidence of tachyphylaxis.
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