<prompt> Therapeutic drug monitoring is advised in allexceptMetforminPhenytoinTacrolimusCyclosporine  <response>: Ans. is a i.e., Metformin o Drugs whose response is easily measurable eg. hypoglycaemics metformin, antihypeensive, diuretics, oral anticoagulants and general anaesthetics, monitoring of plasma conc. is of no value. 