Hello Doctor, my son have been suffering from seizures since three years, currently (from last weeK)he is taking Valparin Chrono 500, along with ferisam 5 mg once in a day,before that he had taken valparin alkalet 400mg twice a day,but seizure occured once in 2 or 3 months,last month he was suffering from headache ,hence doctor changed the medicine. now he was observed with skin rashes ,i request you kindly explain the side effects