Just curious if anyone had been switched from Cozaar to Diovan ? This happened to me just over a week ago and I started having a steady rise in BP. Went to the emergency room after BP got to 190/120 with cold sweats. I have heard that if you are allergic to sulfa based meds you should not be on Diovan. I am allergic to 'Septra.' The emergency room doctor wasn't sure. He put me back on Cozaar 50mg twice a day and things seem to be getting better. Only problem is insurance company does not want to cover it and that is why I was switched in the first place. Any info apprciated.