Folic acid can change how Phenytoin Sodium works in your body, so tell your doctor if you take both.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.
What to do: Ask your doctor or pharmacist before taking these together, and tell them you take both. They may check you or change the plan.