Which assessment technique should the nurse use to monitor a client for a common untoward effect of phenytoin?

A. Auscultation of breath sounds is not a standard assessment for detecting phenytoin’s common side effects. B. Bladder palpation is unrelated to phenytoin monitoring, as urinary retention is not a typical adverse effect. C. Inspection of the mouth is important because phenytoin commonly causes gingival hyperplasia (overgrowth of gum tissue). Early detection allows for prompt oral hygiene interventions to reduce severity. D. Blood glucose monitoring is not routinely indicated for phenytoin therapy, as it does not typically cause significant alterations in glucose metabolism.