A 3-yeаr-оld dоmestic shоrthаired cаt has been diagnosed with ringworm (dermatophytosis). The veterinarian prescribes ketoconazole tablets to be administered at home. As the veterinary technician prepares the medication and discharge instructions, the owner asks how to safely administer and monitor the medication. Which of the following instructions is MOST appropriate for the veterinary technician to provide?