tachyphylaxis

From tachy- +‎ phylaxis.

• (Received Pronunciation) IPA^(key): /ˌtækɪfɪˈlæksɪs/
• (General American, Canada) IPA^(key): /ˌtækɪfɪˈlæksɪs/, /ˌtækəfəˈlæksɪs/
• (General Australian) IPA^(key): /ˌtækɪfɪˈlæksɪs/, /ˌtækəfəˈlæksɪs/
• (New Zealand) IPA^(key): /ˌtɛkəfəˈlɛksəs/
• Hyphenation: ta‧chy‧phy‧lax‧is

tachyphylaxis (plural tachyphylaxes)

1. (medicine) A rapidly decreasing response to a drug following administration of the initial doses.

• tachyphylactic

• mithridatism