Common side effects of Topamax include tiredness, dizziness, nervousness, numbness or tingly feeling, coordination problems, diarrhea, weight loss, speech problems, changes in vision, sensory distortion, and cold symptoms such as stuffy nose, sneezing, or sore throat. You may want to call your primary care physician i think the burning in your feet could be caused from a lot of different things including the Topamax. Start with your general doctor.