What MEDICINES MAY INTERACT with Topamax (Topiramate)?
Tell your health care provider if you are taking any other medicines, especially any of the following: • Carbamazepine or hydantoins (eg, phenytoin) because the effectiveness of Topamax (Topiramate) may be decreased • Amitriptyline, carbamazepine, hydantoins (eg, phenytoin), or metformin because the actions and side effects of these medicines may be increased • Risperidone because its effectiveness may be decreased by Topamax (Topiramate) This may not be a complete list of all interactions that may occur. Ask your health care provider if Topamax (Topiramate) may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.