Asked for Male | 60 Years
Could Diuretics be Impacting My GFR Levels?
Patient's Query
Hello (apologies for long post) Caucasian, Male, 60, 6'0", 260 lbs. Meds: Lisinopril 40 mg, Metoprolol 50 mg x2 a day, Amlodipine 10 mg, Furosemide 20 mg, Glimepiride 1 mg, Janumet 50-1000 x 2, Atorvastatin 10 mg...NO drink/smoke or rec. drugs. Issue: After a lot of work, have lost 40+ lbs in last 5-6 years...blood pressure 130/85, A1c 7.0 ...here is the issue. In March of 2023, after years of my GFR staying constant in mid/upper 40's, (not great, but consistent), it was lower at 41. Dr wanted to check it again in 1 month. I very strictly controlled my diet/sugar/protein/soda/increase water intake, etc...take meds religiously...GFR dropped to 35. Dr sent me to a nephrologist, but before the scheduled appointment (which was 6 weeks later), he took me off of Triamterene...said it can be hard on kidneys. When the nephrologist sent me for labs, GFR went UP to 50. Another test 2 weeks later and GFR went up to 55. Nephrologist says that removing Triamterene from regimen played NO part in GFR rising...put me on Spironolactone due to edema returning . 6 months later at next check-up, all numbers and BP continue to be good, but GFR back down to 40. Is it possible that the diuretics have been hard on my kidneys and causing the lower GFR. I understand with years of HBP/diabetes, the GFR is not ideal, but I'd like to keep it in the 50's if possible. Family doctor took me off the Spironolactone and put me on Lasix in March of 2024...bloodwork coming up in a couple of weeks. Family doctor seems to think the diuretics have contributed to lower GFR...Nephrologist says they have nothing to do with my fluctuating GFR numbers... seeking input from anyone here with knowledge/experience...appreciate any insights re: affect of diuretics on GFR...alternatives to traditional diuretics, etc. I've read loop diuretics like Lasix best for kidney issues.
Answered by Dr. Babita Goel
Diuretics such as Triamterene may have been responsible for your kidney problems, which in turn may have resulted in the increase or decrease of your GFR. The switch from you to Lasix by your family doctor is a good decision as it is a diuretic that may be less harsh on the kidneys. Continue to collaborate with a nephrologist to discover the optimal treatment for you.

General Physician
Questions & Answers on "Nephrology" (131)
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