Anatomy The following Thiazide diuretic is active even if GFR is less than 30-40 mm Hg? A Metolazone B Benzthiazide C Chlorothiazide D Chlohalidone 💡 Explanation The following Thiazide diuretic is active even if GFR is less than 30-40 mm Hg? ✓ Correct Answer: A. Metolazone