Hello, a few months ago my neurologist said that I was suffering CH's.  I was not convinced and saw Doc #2.  This doc never confirmed or denied it. 

Doc #2 prescribed Verapamil, but would NOT give me the O2 that I asked for...INSTEAD prescribed bio-feedback and massive Botox all over head, face and neck (it would cost me $1600...no thanks and MAYBE last 2 to 3 months!).   

After 12 years of this pain in the @$$, I would try almost anything and feel that it's MY right to do so.  These docs have never been in my situation, how can they deny me of O2!?

So, here I am wondering how I can get my hands on O2 without a prescription???  I found recreational (for athletes) use O2 online, but it is only 90% pure and in very small doses.

Should I be looking somewhere else?  Are there restrictions on purchasing O2?

Thanks and I look forward to your ideas.
Springthyme

There are many people on the forums who use welding oxygen instead of medical oxygen as they've found issues with getting medical oxygen.

Welding oxygen is the same level of purity as medical oxygen, coming from the same tanks as the medical oxygen.

Where are you in the world? Someone should be able to give you good advice based on where you are.