Has anyone had HUGE swings up and down in GFR over time ?
Hello all. In June, 2014, I passed a stone (4mm) and had the extreme pain, vomiting. The ER doctor said my kidney was “a stone factory”. 11 years passed. No problems until July, 2024, when I passed a second very large stone, 8 mm. Huge. Zero pain. I went to a urologist and they did a CAT scan and discovered that I had a 14 mm stone in my left ureter and bladder junction. That same CAT scan also discovered my left kidney was “severely atrophied”. Prior to this, no one had ever mentioned anything different about my kidneys. The doctors say that they have no idea why one kidney atrophied so badly or when it did. Then, I was told to “assume I am a solitary one kidney person” In August, 2024, I had the 14 mm stone surgically removed via laser. My right kidney (the good one) had three “non obstructing” stones in it, 8mm, 6mm, and 3mm. A CAT scan done in April 2025 showed 5 “non obstructing” stones in the right kidney (the good one), 6mm, 5 mm, another 5 mm, 3mm and another 3mm. Where the 8 mm went from July, 2024, I don’t know.
Naturally, I was and am scared. My question is this. Why do my eGFR values swing in such huge changes??
eGFR
Jan 19, 2023 ….. 59
May 10, 2024 ….. 56
Oct 14, 2024 ….. 77
Feb 28, 2025 ….. 86
June 19, 2025 ….. 63
July 18, 2025 ….. 63
Sept 25, 2025 ….. 66
January 20, 2026 ….. 53
The last eGFR of 53 , after a eGFR less then one year earlier of 86 has me very concerned and very confused.
The last 18 months I diligently follow a very strict kidney friendly diet, and also Avery strict kidney stone friendly diet. I have not had alcohol in 10 years (was never a big drinker), have not had NSAIDs in 10 years, I never smoked, I have very controlled blood pressure (typically reading 110/70, heart rate 63), blood glucose 100 in labs, I am not a diabetic. I take 50 mg Metaprolol ER once a day, and 5 mg Amlodipine once a day. This has been for 8 years, so no change in medications.
I am male, 62 years old, have no other diseases that I know of other then CKD. Does anyone have any answers, hypothesis, suggestions ? I greatly appreciate you reading and any info would be deeply appreciated.
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I have just read that the FDA has approved 5 new drugs for kidney treatment hopefully this will benefit all of us. I raised my eGFR about 10 points by drinking lots of water. B/4 I was never a water drinker but this came along and now I am a believer. My certainties went from 1.81 to 1.50.
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1 Reaction@faithfully123 I have every confidence in my doctor, Lieske, at Mayo, Rochester. My swings historically were much worse than yours. I am always amazed how much kidney numbers vary. However, you can ease your mind some that you are not in the replacement number area. I found that a low oxalate diet combined with calcium at each meal helped my stones, which were much smaller than yours and blocked my tubules. Between Mayo’s Dietition and using an oxalate list from Harvard’s Chan school I was able to make real changes in my health.
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2 Reactions@cdammen Thanks very much for your reply and for sharing your experiences. I am also doing a low oxalate diet. I have my first nephrologist appointment in early April.
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1 Reaction@rrr1952 Thanks so much. I also hope the new drugs do benefit all of us. Full Hydration is one of my main goals every day.
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1 Reaction@faithfully123 Hydrate but do not overhydrate. I just got out of the hospital for stroke-like symptoms from what I am convinced was hyponatremia ( too much water causing a salt imbalance leading to brain swelling).
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2 Reactions@cdammen I am sorry to hear you were hospitalized, and I hope you are okay now. I agree 100%. In my blood work the past year, I have had borderline low sodium and low chloride, from over hydration. Now, I use Pedialyte for the electrolytes, I don’t know if it works. Damned if we under hydrate, damned if we over hydrate. It’s such a fine balance. Prayers.
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2 Reactions@faithfully123 We just have to become Goldilocks and get it just right!
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1 ReactionWhat are the names of the drugs so we can follow?? Thank you.
Update - I got my blood work yesterday. My eGFR is back up, thankfully, to 68. I am still keeping the appointment with the Nephrologist in April. Thanks for all your advice. Love and prayers for all here.
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