Final answer:
Administering ear medication to an adult involves careful dosage determination and considering metabolism and elimination of drugs.
Step-by-step explanation:
Administering ear medication to an adult involves properly following the dosage and route of administration. The dosage refers to the amount of medication given in a certain time interval, which must be determined carefully to achieve therapeutic drug levels without causing significant side effects. For adults and children 12 years and older, there is typically a single standard dose regardless of the patient's mass. Metabolism and elimination of drugs from the body are also important considerations, as patients with liver or kidney dysfunction may experience reduced drug metabolism or clearance, leading to increased drug levels and potential toxicity.