An older adult patient has confusion, memory loss, and disorientation in familiar surroundings. the patient has been taking donepezil (Aricept) 10mg once daily for 6 months. The patient's symptoms have begun to worsen, and the patient's spouse asks if the medication dose can be increased. What will the nurse tell the spouse?

The patient must take the drug for longer than 1 year before the dose can be increased

The dose can be increased to twice daily dosing instead of once daily dosing

The dose can be increased, because the patient has been taking the drug for longer than 3 months

The increase in symptoms is the result of hepatoxicity from the medication's side effects