Citinol-500 tablet is a medication used to treat stroke, head injury, Alzheimer's disease, and memory loss in Parkinson's disease. It protects and repairs damaged brain nerve cells, improving learning and memory. It is administered under healthcare professional supervision and should not be self-administered. Common side effects include decreased blood pressure, stomach pain, diarrhea, irregular heart rate, rash, insomnia, and numbness of paralyzed extremities. Patients should inform their doctor about kidney problems, seizures, and pregnancy before using this medication.