finasteride 1mg best price We excluded patients who had not undergone PD, those who were taking spironolactone prior to starting PD, those who did not fill the prescription, those who transferred to hemodialysis HD in less than 2 months of PD start, those with missing laboratory data, and those who had concomitant changes to doses of oral potassium supplements, diuretics, RAS blockers, or to their PD prescription during the study period