this is an advert by the drug company - duh! - however, as a CH sufferer who uses Sumitriptan 6mg s/c but tried O2 which did not abort attacks have to say that it really works! However - have you looked into the molecular structure of sumitiptan and how much it is related to LSD!...
I am a doctor who suffers from clusters! - Trust me the experience is hell (I suffer twice yearly for about 6 weeks at a time and at the peak I get 4-6 headaches a day (and they normally come on at night when I try to sleep (8pm-4am) - it took me nearly 10 years to find a medication that works! ...
I am a sufferer too - The following work with varying side effects!:
Sumitriptan - legal - chest pain/sob/flushing - but short-acting 5-10 minutes
Psylocybin - not so legal; hallucinations; not consistent; side effects: last for a couple of hours at most
LSD - illegal; you are looking at a diff...