tachyphylaxis
tach y phy lax is |ˌtakəfiˈlaksis ˌtækəˌfaɪˈlæksəs | ▶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.
tachyphylaxis |ˌtakɪfɪˈlaksɪs | ▶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.