<prompt> Zero order kinetics occur in following drug with high dose:PhenytoinDigoxinAmilorideLithium  <response>: Ans. A. PhenytoinZero order kinetics is due to saturation of metabolizing enzymes i.e. enzymes reach their Vmax Eg Zero WATT powerZeroW-Warfarin,A-Alcohol,T-Theophylline,T-Tolbutamide,Power-Phenytoin,Other - Salicylates, omeprazole 