Fosentin 75mg Injection is used for the treatment of epilepsy (seizures). It controls seizures by decreasing the abnormal and excessive activity of the nerve cells in the brain. Fosentin 75mg Injection is given under the supervision of a healthcare professional and should not be self-administered. You should never skip any doses and finish the full course of treatment even if you feel better as stopping the medication without talking to the doctor may cause non-stop seizures and can endanger life. Be careful if you are using birth control pills as this medicine may interfere with the working of contraceptives. Fosentin 75mg Injection may cause a few side effects such as vomiting, itching, impaired coordination, and involuntary eye movement (nystagmus). It may also cause dizziness and sleepiness in some people, so do not drive or do anything that requires mental focus. Additionally, you may notice some injection site reactions like redness or swelling. Most side effects wear off, but if they bother you or do not go away, tell your doctor. There may be ways of preventing or reducing these effects.