> Honestly don’t bother with canned O2. It is not 100% pure, which is an absolute necessity, and they don’t deliver nearly the quantity you need to knock out a

> Honestly don’t bother with canned O2. It is not 100% pure, which is an absolute necessity, and they don’t deliver nearly the quantity you need to knock out a cluster They definitely don't knock out the cluster, but do seem to slightly lessen the pain in minutes. I wish triptans helped, but no luck yet with any we've tried. Thanks for the help with O2 :)