Jeff, Good Luck and hope the increase helps you. Sounds like your doctor is like mine, and don't really know what to do so he just tries increases of the same med. IF the could only understand these headaches, then they might actually be able to help us all. Hope you are feeling well. Take care, Tammi He's increasing me from three x 40mg pills of Corgard (Nadolol) daily to first four, then six per day. Instead of taking them all before bed, I'm to take three twice a day. He wants to see me again in two months. Jeff