Donzinol-5 Tablet is a medication used to treat mild to moderate dementia in Alzheimer's disease, a progressive illness affecting memory and thinking. It does not cure the disease but may improve symptoms. The dosage may vary, and symptoms may take up to weeks to improve. Common side effects include nausea, diarrhea, insomnia, vomiting, muscle cramps, fatigue, weight loss, headache, loss of appetite, common cold, urinary incontinence, and rash. Before use, inform your doctor about any prior medical conditions or if the medication may affect other medications.