Doncorate 250mg Tablet ER is used to treat epilepsy (seizures) and bipolar disorder. It is also used in the prevention of migraines. It has a calming effect on the brain by relaxing the nerves. Doncorate 250mg Tablet ER may be taken with or without food, preferably at the same time, each day. Take this medicine in the dose and duration as advised by your doctor. If you have missed a dose, take it as soon as you remember it. Never skip any doses and finish the full course of treatment even if you feel better. Do not stop taking it abruptly without discussing it with your doctor, as it may increase seizure frequency. Some of the common side effects of this medicine include headache, blurred vision, loss of appetite, nausea, vomiting, hair loss, and diarrhea. It may also cause dizziness and sleepiness, so do not drive or do anything that requires mental focus until you know how this medicine affects you. This medicine may cause weight gain, and to control it, you should have a balanced diet and exercise regularly. Please consult your doctor if these side effects bother you or do not go away.