Zero order kinetics is followed by all the drugs except: (A) Phenytoin, (B) Barbiturates, (C) Alcohol, (D) Theoplylline
Answer is B. A barbiturate is a drug that acts as a central nervous system depressant, and can therefore produce a wide range of effects, from mild sedation to death . The kinetics of barbiturate elimination are mixed: first order at low concentrations and zero order at high ones Ref-6/e p31