Close follow up. Take as prescribed. Take lowest effective dose. Do not make changes without consulting md. Have blood work when suggested. If medication prescribed for other medical problems, check with neurologist and pharmacist for possible drug interactions. Take vitamins if suggested by md. Always be sure that you still need the medication, in the first place.
See below. Follow your doctor's advise. Routine testing will detect side effect early. Not everybody gets side effect mentioned in the literature. Side effects are weighted against advantage. Each anti epileptic is different for side effect to an individual.