my side effects : - Tingling hands and feet which are going away now, memory problems, word finding difficulties, speech problems, visual hallucinations. Mine ball of light flashing, red/orange colour lasting seconds, then also a white out line of doors or bjects or my body. ( even neurologist's are not aware of these visual problems and because they don't fit into the normal visual aura pattern they may think you are made. The drug company need to put out a visual hallucinatinatinations as a noted side effect. I'm taking Topamax 50mg twice a day for migraine for the last for months. It is only just now controling the migraine. I have lost 12lbs in weight.