I found for me, imitrex were causing longer cycles and rebound Ch's really soon after each attack.
Here is SA, they are no longer available as well.
I think 02 is the best way.
For me, Prednisone and loading D3 is helping.
I went 1 week without an attack or shadow. I actually thought my season was over, but the other night I had 8 attacks at night.
I don't know how to tell if the season is over anymore cos I used to count 7 days and if I'm completely pain free after the 7th day, I know it's over. Now I'm not sure anymore.
I don't get day time attacks this season. Not 1. Just gets me at night.
I think the timing of the Prednisone has to be spot on when I take it at 10 am everyday in-between food.
That seems to be helping me this cycle.
I have those rare nights with multiple attacks as mentioned above.
Also noticed that it happens on a full moon always.