Usual Adult Dose for Alzheimer's Disease:
Mild to moderate Azheimer's disease:
Oral:
-Initial dose: 1.5 mg orally twice a day
-Maintenance dose: After a minimum of 2 weeks of treatment, if the initial dosage is well tolerated, it can be increased to 3 mg twice a day; subsequent increases to 4.5 mg and 6 mg twice a day should be attempted only after a minimum of 2 weeks at the previous dosage.
Usual Adult Dose for Parkinson's Disease:
Mild to moderate Parkinson's disease dementia:
Oral:
Initial dose: 1.5 mg orally twice a day with morning and evening meals
Maintenance dose: Subsequently, the dose can be increased to 3 mg orally twice a day and further to 4.5 mg twice a day and 6 mg twice a day (based on tolerability) with a minimum of 4 weeks at each dose.
 Detailed Exelon dosage information
What happens if I miss a dose?
Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.
If you miss several doses in a row, call your doctor before taking any more of this medicine.
Get your prescription refilled before you run out of medicine completely.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include severe nausea, vomiting, salivation, sweating, slow heartbeats, weak or shallow breathing, fainting, or seizure (convulsions).
