I was put on topamax about 3 weeks ago for migraine headaches. I am up to 75mgs a day. Since I have started taking it, I have felt like a zombie. I have lost interest in everything I normally have interest in doing. I am not sure if this medicine causes depression or if this is a common side effect or not. I have done research and spoken with my doctor who says it may go away in time, but my question is, will if? If so, when? I love the fact that I have not had a migraine since being in the medication, but is it really worth being on it if I am a a completely different person than I was before?