I too have been treated for high blood pressure for forty plus years. Over the years, I've learned to minimize my salt and sugar intake. In the last ten years or so my BP has come down to near "normal".
Last year I was also diagnosed with renal failure. In addition to my nephrologist adjusting my high blood pressure meds, he also told me to stop taking my diuretic and drink only as much water as necessary. In less than a year, my kidney function went from stage 4 to stage 3. He has since prescribed the diuretic at half the dose that it was. I was told to take it only when needed, which I haven't had swelling bad enough to take it.
My point is, follow your doctors instructions and take the meds as prescribed, but you need to put in the effort to improve your health also!