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Potassium Citrate

preventing kidney stones

Human trial evidenceInteraction riskNeeds more research

Potassium citrate is a compound used to alkalinize urine, which may help prevent kidney stones, and is also being investigated for its potential role in blood pressure management.

Potassium citrate is a potassium salt of citric acid. It is commonly used in medicine to alkalinize the urine, which can be beneficial in certain conditions. Its primary role in this context is to increase the pH of urine, making it less acidic. This change in urinary pH can influence the formation and dissolution of certain types of kidney stones. Additionally, potassium citrate may have implications for blood pressure regulation, although the mechanisms and extent of its effects in this area are still being explored. As a supplement, it is available in various forms and is generally considered safe when used appropriately, though caution is advised for individuals with certain medical conditions.

Quick answer

What it is: Potassium citrate is a potassium salt of citric acid.

May support:Kidney Stones, High Blood Pressure

Evidence Summary

The current understanding of potassium citrate's efficacy for kidney stones and high blood pressure is based on established physiological principles and clinical experience. However, without specific PubMed studies provided, a formal evidence grade cannot be assigned. The information presented relies on general medical knowledge regarding its use.

Last reviewed · Jun 2026

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Why It Works

Potassium citrate increases urinary pH, making urine less acidic, which can inhibit the formation of certain kidney stones. It also provides potassium, which may influence blood pressure.

How it works in more detail

Potassium citrate is metabolized into bicarbonate, which is then excreted by the kidneys. This bicarbonate acts as a buffer, increasing the pH of the urine (making it more alkaline). This alkalinization is particularly beneficial in preventing the crystallization of uric acid and cystine stones, which are more soluble in alkaline urine. It also increases urinary citrate levels, and citrate can chelate calcium in the urine, reducing the supersaturation of calcium oxalate and calcium phosphate, thereby inhibiting their crystallization. The potassium component contributes to the body's overall potassium balance, which is known to play a role in blood pressure regulation, potentially by counteracting the effects of sodium and promoting vasodilation.

How to use

Always consult a qualified clinician.

Editorial guidance

Typical forms
capsule, tablet, oral solution
Medication interactions
  • Potassium-sparing diuretics
  • ACE inhibitors
  • Angiotensin receptor blockers (ARBs)
  • NSAIDs
Avoid if
  • Severe renal impairment
  • Untreated Addison's disease
  • Acute dehydration
  • Hyperkalemia
  • Gastric ulceration
  • Esophageal compression

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Safety

Safety warnings

Individuals with impaired kidney function, hyperkalemia (high potassium levels), or conditions that predispose to hyperkalemia should use potassium citrate with extreme caution and under medical supervision. It should not be used in individuals with untreated Addison's disease, acute dehydration, or extensive tissue breakdown. Gastrointestinal irritation can occur.

Avoid if

  • Severe renal impairment
  • Untreated Addison's disease
  • Acute dehydration
  • Hyperkalemia
  • Gastric ulceration
  • Esophageal compression

Medication interactions

  • Potassium-sparing diuretics
  • ACE inhibitors
  • Angiotensin receptor blockers (ARBs)
  • NSAIDs

Reported side effects

  • Nausea
  • Vomiting
  • Diarrhea
  • Abdominal discomfort
  • Hyperkalemia (high potassium levels)

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

Overall grade

The current understanding of potassium citrate's efficacy for kidney stones and high blood pressure is based on established physiological principles and clinical experience. However, without specific PubMed studies provided, a formal evidence grade cannot be assigned. The information presented relies on general medical knowledge regarding its use.

Filter by source type

Randomized Human Trials(1)

Controlled human studies with random assignment.

High Quality
  • Comparison of the Efficacy Between the Dual Therapy of Tegoprazan and the Quadruple Therapy of Tegoprazan: A Randomized Controlled Multicenter Study.

    Liu HN, Wang R, Cao Y, Xian F, Bi XJ, Wu DJ · Clinical and translational gastroenterology · 2024 · n=236

    Tegoprazan (TPZ), a potassium-competitive acid blocker, exerts a strong acid-suppression effect and a rapid onset of action. However, research on TPZ-amoxicillin (TA) dual treatment is limited. Here, we compared the safety and efficacy of TPZ-amoxicillin dual treatment and TPZ, bismuth potassium citrate, amoxicillin, and clarithromycin (TBAC) quadruple therapy in patients newly diagnosed with H. pylori infection over a 14-day treatment period. A total of 236 patients newly diagnosed with H. pylori were enrolled in this multicenter, prospective, open-label, and randomized controlled study. Patients randomly received either TA dual or TBAC quadruple therapy. The incidence of adverse reactions and treatment compliance were recorded and then analyzed. The intention-to-treat analysis revealed that H. pylori eradication rates were 83.9% (95% confidence interval 78.2%-91.3%) and 81.4% (95% confidence interval 74.2%-88.5%) for the TA and TBAC groups, respectively, with no statistically signi

    Randomized TrialPubMedHigh Quality

Observational Studies(2)

Cohort, case-control, and cross-sectional human studies.

Moderate Quality
  • Management of urinary stones by experts in stone disease (ESD 2025).

    Papatsoris A, Geavlete B, Radavoi GD, Alameedee M, Almusafer M, Ather MH · Archivio italiano di urologia, andrologia : organo ufficiale [di] Societa italiana di ecografia urologica e nefrologica · 2025

    The formation of kidney stones is a complex biologic process involving interactions among genetic, anatomic, dietary, and environmental factors. Traditional lithogenic models were based on urine supersaturation in relation to the activity of crystallization promoters and inhibitors. However, modern research has added new principles such as the "renal epithelial cell response" and the role of inflammation and oxidative stress leading to the development of a "multi-hit hypothesis". A strong correlation between urinary stones and kidney damage has been well demonstrated by both cohort and case-control studies. The main contributors to chronic kidney damage associated with urinary stones include crystal deposition within the renal parenchyma, associated comorbidities, repeated obstructive and infectious episodes, as well as the potential adverse effects of stone removal procedures. Most hereditary stones may cause high urinary saturation levels promoting obstruction of the Bellini ducts an

    Observational StudyPubMedLow Quality
  • Evaluation and medical management of kidney stones in children.

    Tasian GE, Copelovitch L · The Journal of urology · 2014

    We review the current literature on the diagnostic evaluation and dietary and pharmacological management of children with nephrolithiasis. We searched MEDLINE(®), Embase(®) and the Cochrane Library from their inceptions to March 2014 for published articles in English on kidney stones and therapy in children 0 to 18 years old. Based on review of the titles and abstracts, 110 of the 1,014 articles (11%) were potentially relevant to the diagnostic evaluation and medical management of nephrolithiasis in children. We summarized this literature and drew on studies performed in adult populations to augment areas in which no studies of sufficient quality have been performed in children, and to highlight areas in need of research. During the last 25 years the incidence of nephrolithiasis in children has increased by approximately 6% to 10% annually and is now 50 per 100,000 adolescents. Kidney stones that form during childhood have a similar composition to those that form

    Observational StudyPubMedLow Quality

Clinical Trial Registries(9)

Registered ongoing or completed trials (ClinicalTrials.gov).

Moderate Quality
  • Assessment of L-methionine Supplementation on Urinary pH in Calcium Phosphate Stone Formers

    n=15 · NCT07465367 · NOT_YET_RECRUITING · NOT_YET_RECRUITING

    Some kidney stones including calcium phosphate and struvite stones form in vary alkaline urine (high pH). Currently available medication for stone prevention, namely citrate supplementation, can lead to even higher pH levels and promote stone formation. Multiple prior studies have looked at ways to acidify the urine to reduce the risk of recurrent stone formation. Ascorbic acid has been evaluated but showed no reduction in urinary pH. Ammonium chloride has shown to be effective but poorly tolerated (GI upset) at higher doses and thus is not recommended. Most recently, citric acid has been investigated but demonstrated no change in pH as compared to placebo. L-methionine is an amino acid which is metabolized to sulfate and hydrogen ions by the liver, thereby conferring an acid load onto the kidney and in theory can reduce the pH. Prior studies have demonstrated effective acidification of the urine in healthy individuals and amongst struvite stone formers. The purpose of this study is to assess the ability of L-methionine to acidify the urine of calcium phosphate stone formers. The study will involved patients abiding by a short term metabolic diet. The diet consists of typical foods (some frozen, some fresh) that have been carefully balanced to match the recommended/optimal amount of calories, protein, fat, sodium and calcium for a specific body weight. After eating this diet for 2 days, patients will begin taking L-methionine. The metabolic diet will then be resumed for 2 days at the end of taking the L-methionine (both taken together). At various times of the study, urine collections will be performed to see whether the urine becomes more acidic as a result of the L-methionine. If applicable, participants will be asked to undergo drug washout, to begin after consenting. If participants are taking Thiazide diuretics including hydrochlorothiazide, Chlorthalidone, and indapamide and alkali medications including potassium citrate, sodium bicarbonate, sodium citrate, and potassium bicarbonate, they will be asked to stop taking them 5 days before Day 1 of the protocol.

    Clinical TrialClinicalTrials.govModerate Quality
  • Analysis of the Impact of Helicobacter Pylori Infection and Eradication on Salivary Microbiome in Adults by 16S Pyrosequencing

    n=60 · NCT03730766 · UNKNOWN · UNKNOWN

    Helicobacter pylori (H. pylori), a bacteria transmitted from human to human through upper digestive tract as well as fecal-oral transmission, had infected more than half of people around the world. However, the quantity of H. pylori in oral cavity and its influence on oral microbiota remains to be unclear. The aim of the present study was to examine the effects of H. pylori infection as well as its eradication on oral microbiota.

    Clinical TrialClinicalTrials.govModerate Quality
  • Does Potassium Citrate Supplementation Reduce Stone Recurrence in Calcium Phosphate Stone Formers With Risk Factors?

    NCT01980004 · WITHDRAWN · WITHDRAWN

    The purpose of this study is to compare the role of potassium citrate supplementation with dietary education versus dietary education alone in the reduction of stone risks and events in patients with predominantly calcium phosphate kidney stones.

    Clinical TrialClinicalTrials.govModerate Quality

Limitations: A significant limitation is the absence of specific PubMed studies to support the claims. Therefore, the content is based on general medical understanding rather than direct evidence from recent research. This means the strength of evidence for specific applications, dosages, and outcomes cannot be formally assessed or quantified.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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