Cluster headaches REALLY HURT!!!!!
(One doctor told me that I had cluster headaches, rather than simple migraines, but another said, that real cluster headaches were MUCH MUCH more painful than the piercing eye/head pain that I had felt)
In any case, when Ibuprofen does not work, there is only one kind of medication that gives me relief here in Japan.
It is called レルパックス Rerupakkusu
English name: Relpax
How it works (basically, it constricts dilated blood vessels in the brain):