Yes, Nurtec is Expensive. For me, more than 3 preventative meds had failed before I started it: Depakote, Elavil (a triptan), Zonisamide and Topamax.
It works both ways. You can keep it on hand and use occasionally to stop thr attacks or, of your attacks are frequent, you can use it preventatively by taking it every other day. In my case the insurance only dispensed 8 tabs at a time so I need to have it delivered twice a month. It would have been prohibitevely expensive without the insurance.