<prompt> Narrow therapeutic index is seen with:DesipramineLithiumPenicillinDiazepam  <response>: Ans. B. LithiumDrugs with narrow therapeutic Index: digoxin, theophylline, lidocaine, cyclosporine, clonidine, anticonvulsant Phenytoin, TCA imipramine, aminoglycosides, glipizide not metformin 