Your MD can petition your insurance company and request help with that. I am not sure how all of it works, but when I was doing heavy chemo, my insurance company dropped one of the meds that worked very well for me, off of the formulary. My MD petitioned them, and they returned it to the forumlary. If no one speaks up, they will not bring it back. The more that speak up, the more pressure they will feel. If your MS center takes care of alot of folks on your type of insurance, it may benefit many, not just you.