I started on 160 mg of Verapamil and second week doubled it so I am at 320 mg right now. I am taking other blood preasure meds also so I guess that it is a concern for the Dr. The O2, re-breathable (the one with an extra bag attached to it) at 12 - 15 lpm, for some reason, is so cold that it sends me screaming. It is like there is a membrane in the very back of my nostril "air-intake" that feels as if is is dry and cracked and I can't even breathe through my right nostril when it is at its worst... Sound strange but that is the best way I can explain it. Tried the Imitrex injection - scary stuff for me with my heart racing. Tried looking a the D3 regimen but my head is not clear enough for all the info yet - I will look at it later. I agree with the thought that CH somehow is inflammatory-based and like if the body is missing something vital - could be a vitamin deficiency, it makes a lot of sense to me.