I was refused this Rx, because its cost would put me over my alloted cap for per monthly fees. It was quite the struggle, and the neuro worked hard, but was told, NOPE! and they suggested I drink a cup of coffee instead. OMG! insurance companies are rude! Its horrible when your MD says you need something, and an non medical person can say ...nope, its too pricey.
I would call the NMSS and knock on other doors. Go down swinging.