Donepezil is a prescription drug used to treat mild to moderate alzheimer's disease. It belongs to a class of compounds known as acetylcholinesterase inhibitors. The medication blocks the enzyme that breaks down acetylcholine in neural synapses. By preventing this breakdown the concentration of acetylcholine in the brain rises. Increased acetylcholine enhances communication between nerve cells that are involved in memory and thinking. This biochemical effect is intended to slow cognitive decline and improve daily functioning in patients with alzheimer's disease.

Donepezil is a medication used to treat symptoms of mild to moderate alzheimer disease. It functions as an acetylcholinesterase inhibitor that increases levels of the neurotransmitter acetylcholine in the brain. This elevation of acetylcholine enhances communication between neurons and helps compensate for the loss of cholinergic cells associated with the disease. The drug binds selectively to the catalytic site of acetylcholinesterase, slowing the breakdown of acetylcholine and prolonging its action. By maintaining higher acetylcholine concentrations, Donepezil supports memory, attention and other cognitive functions in patients. The overall therapeutic effect is to slow the progression of cognitive decline and improve daily functioning in individuals with alzheimer disease.

Donepezil may cause nausea. It can lead to loss of appetite. Some users experience diarrhea. It may result in dizziness. Fatigue is another possible side effect. Headache can occur in some patients. Memory disturbances such as confusion have been reported.

Some patients experience nausea diarrhea or loss of appetite when taking Donepezil. Fatigue and dizziness are also reported as common reactions. Muscle cramps and headache may occur but are usually mild. Occasional stomach pain or mild insomnia can appear during treatment. These effects often diminish as the body adjusts to the medication. Serious side effects are rare but should be monitored by a healthcare professional.