IV Dihydroergotamine 3-5 Day Series

Hi... I had a 5 day IV DHE series several years ago at Johns Hopkins which did help considerably for about a month with my chronic daily headaches and then slowly my headaches resumed in their composition of pressure type pain. I have just read on Dr. Lawrence Robbins' site that he does REPEATED IV DHE SERIES...and I am going to see if I can talk my pain specialist doctor into doing a repeated series of these. Has anyone else done these and what has your experience with them been??? Anyone been to Dr. Lawrence Robbins in Chicago and what do you think of him? Blondielou