Verapamil ER 120 mg works for me and has stopped the attacks but I have noticed in the past week or two that my feet and ankles swell up and look interesting. Soon as I elevate them they start to reduce. My Stanford Doc want me to double but I have decided to stay the course. As for the injection, I have only had to do it 3 times. First was interesting. Within the first 15 seconds I could feel it go up my neck into my head without problems and pain was gone. 2nd time I got a bit warm and 3rd time warm and nauseous. I have not had to do it for over a month since I do the Verapamil in the evening along with 3 mgs of prednisone and a shot of Fluticasone nasal spray. A breathrite on my nose at bed...And NO alcohol, ever!