Eptoin Suspension is used to treat epilepsy/seizures, and prevent seizures during/after brain surgery or after traumatic brain injury. It contains Phenytoin, which helps prevent neurons from working at a very fast speed, thereby preventing the brain cells from firing together rapidly in an uncontrolled way. As a result, it helps control seizures. In some cases, it may cause certain common side effects such as weakness, drowsiness, dizziness, confusion, restlessness, slurred speech, constipation, loss of coordination, and abnormal eye movement. Before taking this medicine, inform your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and any pre-existing medical conditions.