Is there a link between proton pump inhibitors and kidney disease?

Is there really a link between PPIs and kidney disease?

Yes, the evidence is strong and consistent. Multiple large-scale meta-analyses — which combine results from many studies — have found that people who take proton pump inhibitors (PPIs) are significantly more likely to develop chronic kidney disease (CKD) and to progress to end-stage renal disease (ESRD, or kidney failure). One meta-analysis of 15 studies found that PPI users had a 68% higher risk of developing CKD (RR = 1.68) and a 15% higher risk of ESRD (RR = 1.15) [2]. Another meta-analysis of 10 studies found a 35% higher risk of CKD and a 49% higher risk of ESRD [3]. A third, which included nearly 7 million participants, found a 72% higher risk of CKD (RR = 1.72) [4]. These results come from different research groups, using different databases, and they all point in the same direction: PPI use is associated with a meaningful increase in kidney risk.

How big is the risk, and who should be most concerned?

The risk is not trivial, and it is dose- and duration-dependent. The longer you take PPIs and the higher the dose, the greater your risk. For example, one study found that patients under 60 who took PPIs for more than two years had a nearly 7-fold higher risk of bone fractures (OR 6.85) [5]. While this study focused on fractures, it illustrates the principle: prolonged PPI use amplifies harm. People with existing kidney disease are especially vulnerable. One study found that CKD patients are prescribed PPIs more often and for longer durations than people without kidney disease — a median of 120 days for stage 3-4 CKD versus 90 days for those without CKD [10]. This is concerning because CKD patients already have reduced kidney function, and PPIs may worsen it. Additionally, PPIs can cause hypomagnesemia (dangerously low magnesium levels), which is particularly risky for diabetic kidney disease patients [7]. The evidence also shows that PPIs can raise levels of uremic toxins — waste products that build up in kidney failure — independently of kidney function, suggesting a direct toxic effect [9].

Should you stop taking your PPI?

Do not stop your PPI abruptly without talking to your doctor, but do have that conversation. The evidence is clear that PPIs are overprescribed and often used without a clear medical need. One study found that only 4.5% of the general US population has stage 3 or 4 CKD, yet PPI use was highest among people with multiple health conditions and those with CKD — suggesting that sicker patients are being prescribed PPIs more often, even when the benefit may be small [8]. The same study found that people with stage 4 CKD were 6.5 times more likely to be using PPIs than those with stage 1 CKD [8]. This pattern of overuse is dangerous because PPIs are linked not only to kidney disease but also to serious infections in children (34% higher risk) [1] and gastric cancer in adults (15% higher risk) [6]. The expert consensus from these studies is clear: PPIs should be prescribed only when there is a clear indication (like severe GERD or an ulcer), at the lowest effective dose, and for the shortest possible time. If you have kidney disease or risk factors for it, your doctor should monitor your kidney function and consider whether you still need the PPI.

About These Sources

This answer is built on 10 peer-reviewed studies — published from 2019 to 2026, 3 from 2024 or later, 4 in Q1 journals, collectively cited 119 times — selected as the most relevant from 11 studies that passed quality screening, drawn from 42 papers retrieved from a database of over 500 million.

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