Sometimes to Topamax may be used in conjunction with an aap or another medication that is notorious for causing weight gain. Is it possible you doc is being sensitive to you ED issue? The issues with word forgetfulness usually are not noticeable at a target dose of 100mg daily. Generally, topamax has a mild calming affect. It can help with generalized pain as well. Sometimes there may be a blurring a vision at the very onset of treatment which should abate quickly. I have been satisfied with my 100mg treatment. Good luck.