I can tell you this, I was diagnosed with epilepsy about 16 or 17 months ago and Topamax is one of the three seizure medications I am on. It has also helped my migraines tremendously. I had asked my neurologist about cutting back on some of my medications and he let me cut back on the Topamax. My migraines started coming back, so I called him and asked if I could go back to where I was for that reason.
Insurance only allows you nine Imitrex per month and I used to pray that I could make it through the month with nine. Now, I go months without getting it refilled. I hope this information helps you. I also have severe asthma. If you have any other questions, I will be glad to try to answer them for you.