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What are the side effects of Topamax (topiramate)?

Topamax may cause side effects. Serious side effects include: inability to concentrate and problems with memory, impaired speech and imbalance, a tingling feeling or loss of sensation and weight loss. You might feel eye pain, your eyes may become red or your vision may be blurry. You might become confused or feel nervous. Other serious side effects include: sudden blindness or severe eye pain; serious confusion accompanied by dry mouth; elevated body temperature, skin dryness and thirst; muscle aches or seizures accompanied by vomiting; rapid heart rate; fainting; increased urine output or trouble when you urinate; serious pain in your lower back or side. If you experience any of these symptoms, call your doctor right away.

If you begin to have facial swelling, hives or breathing trouble after taking Topamax, call 911, as you're likely experiencing an allergic reaction. If you experience dramatic mood changes in general or begin feeling depressed, anxious, nervous, aggressive, hyperactive or suicidal, these are serious side effects and your doctor should be notified immediately. Less serious side effects include: feeling tired, headaches, dizzy or difficulty sleeping. If these become bothersome, call your doctor.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.