karen
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        my friend  awful clusters  on imitrex also just put on  verapamil.  i use  same  drug  for  high/bp Rick dr  using this drug for cluster is to hopefully bring his b/p dwn and stop headaches & bring  down his  chlosterol same  time takes  ½ hr  for  verapamil to work....     it  does  but cluster bk tomorrow or later at nite  whenever it feels like coming  bk:(