20 yrs ago in taking a diaretic for high blood pressure it formed kidney stones..I have just been changed from Quinaretic 20-12.5 mg one tablet a day to Losartan Potassium and Hydrochlorothiazide 100 mg/12.5 mg one tablet a day on Jan. 18th... Thurs. Jan. 27th and Fri. Jan. 28th had a good amount of blood in urine during late night and early mornings..my question is could the new prescription be what is casuing this... could it have formed kidney stones again..The change in the prescription was done because Nose Specialist seemed to think that my blood pressure meds could be causing the continuous drainage in sinius..a ultra sound of the kidney and a scope of urinary are being ordered by doctor... the instance of 20 yrs. ago has been conveyed to the doctor