I discovered feverfew herbal migraine tablets recently, in my local Holland and Barrett store UK. They were labelled as 'Migraherb'.
This morning, I Had the start of a cluster headache and nausea.
Deep breathing was not helping, this time. So I took one of the tablets. Within 20 minutes, the headache and nausea has virtually gone.
They don't seem to work when I am in the full throws of a migraine, but seem to prevent it developing.
The recommended dose is one tablet a day, so it maybe a good idea to have something else to hand. I would consult a physician if you are on medication
Please let me know if this helps