Prednisone
cluster headaches
"In my third recurrance of cluster headaches over a 10 year period, they have become far more intense and frequent, over a month with no let up. As many as four per day. Started on 50mg for four days. Fifth day no prednisone and headaches were back. Now I'm back on prednisone (60mg for 5 days and reduce by 10mg until off) and it is so far keeping them at bay."