This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacokinetics, Subject name: Pharmacology
Following drugs show zero order kinetics except- 
Select and explain. 
A. Phenytoin, B. Tolbutamide, C. Alcohol, D. Fomipizole
D: Fomipizole
Answer: D: Fomipizole 
Explanation: Ans. is 'd' i.e., Fomipizole o The drugs whose kinetics changes from first order to zero order at therapeutic concentration are said to follow pseudo - zero order kinetics or mixed order kinetics or saturation kinetics.o Drugs showing zero,''pseudo-zero order kinetics :y Phenytoiny Tolbutamidey Propanolol (ref- Pharmocolgy recap)y Theophylliney Warfariny Alcoholy Salicylates (Aspirin)