An Older Adult Patient Displays Confusion, Memory Loss, and Disorientation

An older adult patient displays confusion, memory loss, and disorientation in familiar surroundings. Although the patient has been taking donepezil 10 mg once daily for 6 months, the symptoms have begun to worsen, and the patient's spouse asks if the medication dose can be increased. What response will the prescriber provide to best address the spouse's concerns?

A) "The dose can be increased, because the patient has been taking the drug for longer than 3 months."
B) "The dose can be increased to twice daily dosing instead of once daily dosing."
C) "The increase in symptoms is the result of hepatotoxicity from the medication's side effects."
D) "The patient must take the drug for longer than 1 year before the dose can be increased."