I have had 3 or 4. They were ok for breaking cycle but only for 3 or 4 days. Mine were given by neurologist in Los Angeles. In my experience it’s for those really tough moments in a cycle.
Agree with ShaunPiko, but will add.....er, wait a minute, they really went full nutshell on it, so I just have to agree with no real need to add anything.
(OK, this has also partly been about finding some way to interject the term 'ShaunPiko' into the conversation.)
Most of us use M tanks. Huge cylinders. Get friendly w your delivery person. It goes a long way. I have always used Apria, tipped them randomly when I can and asked for their Cell #s. I txt them when I am running low and always get 3-5M tanks per refil. They have seen me get an attack and have had other CH patients. They knew about busting and have all become friends. I’m terrified since I moved and haven’t called them yet in my new location. Will call Monday as I’m out of ketamine and nursing my tanks. Ran through half a tank last night. I usually go through 1/2-1 big M tank a day. If I use E tanks one tank is good for 1-2 CH. at 25LPM. The mask and high flow will do wonders for stopping an attack...