for hypertension during treatment we have a PRN clonidine that can be give up to 3 times during treatment for SBP > 180. Idk if you guys have that. It is true that dialysis can be sucking out their blood pressure medicine, I have seen the effects of that before. But another doctor told me there's an effect called renin overproduction where they kidney's still produce renin and overly compensates for loss of fluids by raising BP too high. But that supposedly happens in only 5% of patients. If it's not that, then challenge your patients. If they run SBP > 180, you should automatically be thinking of challenging them up to 0.5 kg depending on what your MD has ordered.