Emgality Shot for Episodic Clusters in General Board Posted 14 hours ago · Report reply Hi @S.E. I was chronic & now use no pharmaceutical treatments, I simply bust periodically to remain pain free. My story differs from many. I could not take D3, Verapamil, Prednisone etc. Imitrex injections just made things worse so I used only oxygen until the CCH was busted.