Pharmacology General 5487bd71 Thiazide diuretic used when GFR<30 ml/min? A Metolazone B Benzthiazidc C Chlohiazide D Hydrofulthiazide High-Yield Explanation Ans. is 'a' i.e., Metolazone o Metolazone is the only thiazide which is effective in severe renal failure.