I've had these CH for 15 years and I've tried damn near everything on the market with no relief. O2 has been the closest thing to combat these evil things. I went to an acupuncturist to see if they had any idea on how to help me. They put a few needles in me and that didn't work too well so I went back and they did the same thing but they gave me shots of vitamin E. I ended up getting 4 shots of 1cc of vitamin E, 2 to the nerve above my eye and 2 to the nerve in my temple. You have to find an acupuncturist with an MD title because if they don't have MD title they can't give shots to their patients. I did not have the CH that year so I did it again this year and so far I'm winning the battle!!! I do not get CH all year long, they usually start in late August and last for 3 months and I get 3 a day and each one lasts 3 hours.
I hope this helps others that have these evil things.