Is cycle coming to an end? in General Board Posted August 29, 2019 I would not think your cycle is ending I think the Verapamil may be kicking in. It can take up to a week for you to start feeling the effects from that. Most times your doctor will give you a Prednisone taper to hold you over until the Verap starts to work. You are better off without the prednisone, that can do some harm to your joints.. MRI is good to rule out any other things that may be going on and like Freud said you will want to look into getting oxygen to abort your attacks. I also will down a 5hr energy drink at the start of a cluster to help the oxygen kick in faster for a quick abort or to help some of the stubborn ones go away. Tuns of information on this site and everyone is here to help so read as much as you can and ask questions..