Bruera, E., Strasser, F., Shen, L., Palmer, J.L., Willey, J., Driver, L.C., & Burton, A.W. (2003). The effect of donepezil on sedation and other symptoms in patients receiving opioids for cancer pain: A pilot study. Journal of Pain and Symptom Management, 26, 1049–1054.
Donepezil 5 mg every morning for seven days
Fatigue significantly was improved following a seven-day course of treatment with donepezil. Significant improvement was noted in anxiety, well-being, sleep problems, depression, and anorexia. Pain level was unchanged. Of the initial 27 patients enrolled in the study, 7 patients were discontinued from the study due to cellulitis (1 patient), concern about a possible drug-drug interaction (1 patient), transient arterial hypertension (1 patient), increasing muscle cramps (1 patient), and mild to moderate nausea (3 patients).