My son,42 is being treated for cluster migraines....had 2 rounds prednisone...1500mg magnesium,added generic topomax....still constant painful headaches, and diarrhea..pA is treating him...cannot get in to neurologist until dec11....he has to work, w no breaks or lunchtime...please help...last time 2 yrs ago, he ended up in the er on oxygen, pain drip