Getting medicaid to foot the bill. I have a badly injured knee that really neeeds anit-inflamatory medication

I cannot take any of them due to stomach problems. There is only one anti-inflamatory medication that does not pass through the stomach called Toridol. It is an inter muscular injection. My doctor knows I can give myself the shot, and gave me a prescription for it. However Medicaid won't cover it. I'm guessing that's because there are so many out there that do not have to be injected, and it's not a usual medication to take home. Its really more than I can afford with my income. Does anyone know how to appeal their decision? My body will not allow me to anything else. Nothing else will do what this med does. Even using 2 vicoden es every 4 hours do not work well without an anti-inflamatory medication as well. I really need this as I have been in constant pain since the 7th of June. I'm still waiting to see what kind of surgery they want to do. I won't see the surgeon until the 26th of this month. Help!