For others coming here for information, I'll say this: The doctor wanted me to try taking this medicine when I first started to feel the back of my neck tighten, indicating I was about to go into a bad spell in my chronic migraines. He noticed that I stretch my neck a lot, which I do because I'm never pain free back there. I got a chance to try it a few weeks ago. Sadly, but predictably, it didn't shorten the number of bad days I had. It was an outside chance, anyways.
I did tolerate it fairly well, though. This is a first for me as the other meds have all created some bad side effects. So, I now have something I can take for the very worst of days, but not regularly.
I took 5 doses in 5 days. I did have a little rebound anxiety. So in the future, I think I'll be limiting this to one or two day's use. It didn't wipe out the headache, but I was more comfortable resting and I was able to work through it in my very quiet and comfy work environment.
It didn't keep me up all night! I slept great and I wasn't too groggy in the day. But I did "need" more coffee in the morning, leading me to have to deal with caffeine withdrawal now as I get myself back to my safe, one cup a day rule.
So basically: great pain reliever, didn't help shorten the migraine, too dang bad it's addictive as he!! and I can't be on it long-term.