procainamide

noun

pro·​cain·​amide (ˌ)prō-ˈkān-ə-ˌmīd  -məd; -ˌkān-ˈam-əd 

: a base of an amide related to procaine that is used in the form of its hydrochloride C₁₃H₂₁N₃O·HCl as a cardiac depressant especially in the treatment of ventricular and atrial arrhythmias see pronestyl