I have just started taking Zonisamide for headaches, I was wondering on average how long it takes to see a decrease or stop in headaches for anyone who has or is taking this medicine. Waiting for approval for MRI through insurance company. Really getting tired of being in pain. Have been headache free for 5 days out of last 31, varying levels of pain, some 1-2 on scale, and some all the way up to 10+, having to go to hospital twice for pain relief. These headaches came on about a month ago out of nowhere. First headache lasted 13 days. So excited for some relief!! Thanks all!!