Cast Iron - he had already used 4 Imgality shots which was the max he can take in a week....and 3 Emgality Shots plus we always have O2 at home ...25 lpm regulater, rebreather mask and M tank. As I said. Both he and my daughter have had clusters for years. We are unfortunately "Pro's" in this area...not that we want to be. They also do the Vitamin D regimen. We went to the ER because nothing was working this cycle. He hadn't slept in a week..the pain wouldn't let him . Sleeping pills wasnt working. He was having suicidal thoughts. He wanted to be knocked out at the hospital with IV Benadryl. OTC Benadryl..even at high doses wasn't working. They gave him 3 iv bags of benadryl with Toradol and Steroids..didn't touch it. They gave him Propofel..and that worked. We have never in all the years he has had this needed to go to the ER because we can manage it at home. My issue is with the lack of compassion and ignorance the lower level medical staff have about Clusters. When your in a crisis situation and go to the place that is supposed to help you and they kick you when your already down is pathetic!