Which of the following local anaesthetics belongs to the ester group?: (A) Procaine, (B) Bupivacaine, (C) Lignocaine, (D) Mepivacaine
Answer is A. Procaine belongs to ester group. Since Ester links are more prone for hydrolysis than amide links generally esters have a shoer duration of action. Other three are amide group. From padmaja 4th edition Page no 199