When the doctor prescribed HCTZ, which evidently has sulfa in it, my sister reacted to that.
There are lots and lots of other blood pressure
drugs beside the three or so that you have tried. But because you've had adverse reactions to three different drugs, you might want to try natural methods to control your blood pressure. You may be able to minimize the use of medication that way. If your natural approach is successful enough, you might not even need medication in the long run.