Hey there!
I have been on IV steriods twice. The second time I went on them I pretty much had to beg the Dr. to give them to me. My Dr. explained that my body is going to do what it wants to do. If it wants to attack itself, it will. The steroids don't stop the attacks or lessen the severity of them. They also don't heal your attacks. They just make you more comfortable. This is what I got from my Dr. They are hesitant to do IV steriods because of the side effects. It's very hard on your veins and body. Hopes this helps...
Take care!