Propranolol
"After quitting drinking about a year ago I developed severe migraine headaches. The Propranolol LA 160MG caps have worked very well and I seldom get migraines.  I decided because of cost and the fact I was having so few headaches, to try and wean myself from this medication, within 2 days the headaches were back.  So I'm back on the Propranolol and back to being headache free most of the time."