Study Summary
This trial is studying whether a supplement called urea could be used to treat low blood sodium levels. The goal is to learn if it's safe, if patients can tolerate it, if it raises blood sodium levels, and if it prevents brain fog or loss of balance.
- Low Sodium
- Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
Treatment Effectiveness
Effectiveness Progress
Study Objectives
17 Primary · 7 Secondary · Reporting Duration: 13.5 months
Trial Safety
Safety Progress
Trial Design
2 Treatment Groups
On Urea, Then Off Urea
1 of 2
Off Urea, Then On Urea
1 of 2
Experimental Treatment
30 Total Participants · 2 Treatment Groups
Primary Treatment: Urea · No Placebo Group · Phase 2
Trial Logistics
Trial Timeline
Who is running the clinical trial?
Eligibility Criteria
Age 18+ · All Participants · 6 Total Inclusion Criteria
Mark “Yes” if the following statements are true for you:- Rondon-Berrios, Helbert, and Tomas Berl. 2015. “Mild Chronic Hyponatremia in the Ambulatory Setting: Significance and Management”. Clinical Journal of the American Society of Nephrology. American Society of Nephrology (ASN). doi:10.2215/cjn.00170115.
- Gankam-Kengne, Fabrice, Colby Ayers, Amit Khera, James de Lemos, and Naim M. Maalouf. 2013. “Mild Hyponatremia Is Associated with an Increased Risk of Death in an Ambulatory Setting”. Kidney International. Elsevier BV. doi:10.1038/ki.2012.459.
- Decaux, Guy. 2006. “Is Asymptomatic Hyponatremia Really Asymptomatic?”. The American Journal of Medicine. Elsevier BV. doi:10.1016/j.amjmed.2006.05.013.
- Verbalis, Joseph G, Julianna Barsony, Yoshihisa Sugimura, Ying Tian, Douglas J Adams, Elizabeth A Carter, and Helaine E Resnick. 2009. “Hyponatremia-induced Osteoporosis”. Journal of Bone and Mineral Research. Wiley. doi:10.1359/jbmr.090827.
- Nervo, Alice, Valentina D'Angelo, Daniela Rosso, Eleonora Castellana, Francesco Cattel, Emanuela Arvat, and Emidio Grossi. 2019. “Urea in Cancer Patients with Chronic Siad‐induced Hyponatremia: Old Drug, New Evidence”. Clinical Endocrinology. Wiley. doi:10.1111/cen.13966.
- Verbalis, Joseph G., Arthur Greenberg, Volker Burst, Jean-Philippe Haymann, Gudmundur Johannsson, Alessandro Peri, Esteban Poch, Joseph A. Chiodo III, and Jiten Dave. 2016. “Diagnosing and Treating the Syndrome of Inappropriate Antidiuretic Hormone Secretion”. The American Journal of Medicine. Elsevier BV. doi:10.1016/j.amjmed.2015.11.005.
- Kruse, C., P. Eiken, and P. Vestergaard. 2014. “Hyponatremia and Osteoporosis: Insights from the Danish National Patient Registry”. Osteoporosis International. Springer Science and Business Media LLC. doi:10.1007/s00198-014-2973-1.
- Hoorn, Ewout J, Fernando Rivadeneira, Joyce BJ van Meurs, Gijsbertus Ziere, Bruno HCh Stricker, Albert Hofman, Huibert AP Pols, Robert Zietse, André G Uitterlinden, and M Carola Zillikens. 2011. “Mild Hyponatremia as a Risk Factor for Fractures: The Rotterdam Study”. Journal of Bone and Mineral Research. Wiley. doi:10.1002/jbmr.380.
- Mohan, Sumit, Sue Gu, Amay Parikh, and Jai Radhakrishnan. 2013. “Prevalence of Hyponatremia and Association with Mortality: Results from NHANES”. The American Journal of Medicine. Elsevier BV. doi:10.1016/j.amjmed.2013.07.021.
- Bhandari, Sunil, Alessandro Peri, Iain Cranston, Rachael McCool, Alison Shaw, Julie Glanville, Larisa Petrakova, and Karl O'Reilly. 2017. “A Systematic Review of Known Interventions for the Treatment of Chronic Nonhypovolaemic Hypotonic Hyponatraemia and a Meta-analysis of the Vaptans”. Clinical Endocrinology. Wiley. doi:10.1111/cen.13315.
- Rozen-Zvi, Benaya, Dafna Yahav, Mihai Gheorghiade, Asher Korzets, Leonard Leibovici, and Uzi Gafter. 2010. “Vasopressin Receptor Antagonists for the Treatment of Hyponatremia: Systematic Review and Meta-analysis”. American Journal of Kidney Diseases. Elsevier BV. doi:10.1053/j.ajkd.2010.01.013.
- Vandergheynst, Frédéric, Yannick Gombeir, Flavio Bellante, Gaetano Perrotta, Gauthier Remiche, Christian Mélot, Nicolas Mavroudakis, and Guy Decaux. 2016. “Impact of Hyponatremia on Nerve Conduction and Muscle Strength”. European Journal of Clinical Investigation. Wiley. doi:10.1111/eci.12597.
- Schrier, Robert W., Peter Gross, Mihai Gheorghiade, Tomas Berl, Joseph G. Verbalis, Frank S. Czerwiec, and Cesare Orlandi. 2006. “Tolvaptan, a Selective Oral Vasopressin V2-receptor Antagonist, for Hyponatremia”. New England Journal of Medicine. Massachusetts Medical Society. doi:10.1056/nejmoa065181.
- Zhang, Xiangyun, Mingyi Zhao, Wei Du, Dongni Zu, Yingwei Sun, Rongwu Xiang, and Jingyu Yang. 2016. “Efficacy and Safety of Vasopressin Receptor Antagonists for Euvolemic or Hypervolemic Hyponatremia”. Medicine. Ovid Technologies (Wolters Kluwer Health). doi:10.1097/md.0000000000003310.
- Torres, Vicente E., Arlene B. Chapman, Olivier Devuyst, Ron T. Gansevoort, Jared J. Grantham, Eiji Higashihara, Ronald D. Perrone, Holly B. Krasa, John Ouyang, and Frank S. Czerwiec. 2012. “Tolvaptan in Patients with Autosomal Dominant Polycystic Kidney Disease”. New England Journal of Medicine. Massachusetts Medical Society. doi:10.1056/nejmoa1205511.
- Lockett, Jack, Kathryn E. Berkman, Goce Dimeski, Anthony W. Russell, and Warrick J. Inder. 2019. “Urea Treatment in Fluid Restriction-refractory Hyponatraemia”. Clinical Endocrinology. Wiley. doi:10.1111/cen.13930.
- Soupart, Alain, Michel Coffernils, Bruno Couturier, Fabrice Gankam-Kengne, and Guy Decaux. 2012. “Efficacy and Tolerance of Urea Compared with Vaptans for Long-term Treatment of Patients with SIADH”. Clinical Journal of the American Society of Nephrology. American Society of Nephrology (ASN). doi:10.2215/cjn.06990711.
- Borg, Frank G, and Gerd Laxåback. 2010. “Entropy of Balance - Some Recent Results”. Journal of Neuroengineering and Rehabilitation. Springer Science and Business Media LLC. doi:10.1186/1743-0003-7-38.
- Decaux, G., F. Gankam Kengne, B. Couturier, W. Musch, A. Soupart, and F. Vandergheynst. 2018. “Mild Water Restriction with or Without Urea for the Longterm Treatment of Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH): Can Urine Osmolality Help the Choice?”. European Journal of Internal Medicine. Elsevier BV. doi:10.1016/j.ejim.2017.09.024.
- Decaux, G, Y Waterlot, F Genette, R Hallemans, and J C Demanet. 1982. “Inappropriate Secretion of Antidiuretic Hormone Treated with Frusemide.”. Bmj. BMJ. doi:10.1136/bmj.285.6335.89.
- Refardt, Julie, Bernadette Kling, Katharina Krausert, Martin Fassnacht, Stefanie von Felten, Mirjam Christ-Crain, and Wiebke Fenske. 2018. “Impact of Chronic Hyponatremia on Neurocognitive and Neuromuscular Function”. European Journal of Clinical Investigation. Wiley. doi:10.1111/eci.13022.
- Decaux, G, and F Genette. 1981. “Urea for Long-term Treatment of Syndrome of Inappropriate Secretion of Antidiuretic Hormone.”. Bmj. BMJ. doi:10.1136/bmj.283.6299.1081.
- Renneboog, Benoit, Wim Musch, Xavier Vandemergel, Mario U. Manto, and Guy Decaux. 2006. “Mild Chronic Hyponatremia Is Associated with Falls, Unsteadiness, and Attention Deficits”. The American Journal of Medicine. Elsevier BV. doi:10.1016/j.amjmed.2005.09.026.
- Spasovski, Goce, Raymond Vanholder, Bruno Allolio, Djillali Annane, Steve Ball, Daniel Bichet, Guy Decaux, et al.. 2014. “Clinical Practice Guideline on Diagnosis and Treatment of Hyponatraemia”. Nephrology Dialysis Transplantation. Oxford University Press (OUP). doi:10.1093/ndt/gfu040.
- Corona, Giovanni, Corinna Giuliani, Joseph G. Verbalis, Gianni Forti, Mario Maggi, and Alessandro Peri. 2015. “Hyponatremia Improvement Is Associated with a Reduced Risk of Mortality: Evidence from a Meta-analysis”. Edited by Yan Gong. Plos One. Public Library of Science (PLoS). doi:10.1371/journal.pone.0124105.
- Connaboy, Christopher, Caleb D. Johnson, Alice D. LaGoy, Gert-Jan Pepping, Richard J. Simpson, Zhigang Deng, Luming Ma, et al.. 2019. “Intersession Reliability and Within-session Stability of a Novel Perception-action Coupling Task”. Aerospace Medicine and Human Performance. Aerospace Medical Association. doi:10.3357/amhp.5190.2019.
- Wang, Lingling, Kristina Krasich, Tarik Bel-Bahar, Lauren Hughes, Stephen R. Mitroff, and L. Gregory Appelbaum. 2015. “Mapping the Structure of Perceptual and Visual–motor Abilities in Healthy Young Adults”. Acta Psychologica. Elsevier BV. doi:10.1016/j.actpsy.2015.02.005.
- Kang, H. G., M. D. Costa, A. A. Priplata, O. V. Starobinets, A. L. Goldberger, C.-K. Peng, D. K. Kiely, L. A. Cupples, and L. A. Lipsitz. 2009. “Frailty and the Degradation of Complex Balance Dynamics During a Dual-task Protocol”. The Journals of Gerontology Series A: Biological Sciences and Medical Sciences. Oxford University Press (OUP). doi:10.1093/gerona/glp113.
- Wallmann, H. W.. 2001. “Comparison of Elderly Nonfallers and Fallers on Performance Measures of Functional Reach, Sensory Organization, and Limits of Stability”. The Journals of Gerontology Series A: Biological Sciences and Medical Sciences. Oxford University Press (OUP). doi:10.1093/gerona/56.9.m580.
- Greenberg, Arthur, Joseph G. Verbalis, Alpesh N. Amin, Volker R. Burst, Joseph A. Chiodo III, Jun R. Chiong, Joseph F. Dasta, et al.. 2015. “Current Treatment Practice and Outcomes. Report of the Hyponatremia Registry”. Kidney International. Elsevier BV. doi:10.1038/ki.2015.4.
- Erickson, Graham B., Karl Citek, Michelle Cove, Jennifer Wilczek, Carolyn Linster, Brendon Bjarnason, and Nathan Langemo. 2011. “Reliability of a Computer-based System for Measuring Visual Performance Skills”. Optometry - Journal of the American Optometric Association. Elsevier BV. doi:10.1016/j.optm.2011.01.012.
- Vereeck, Luc, Floris Wuyts, Steven Truijen, and Paul Van de Heyning. 2008. “Clinical Assessment of Balance: Normative Data, and Gender and Age Effects”. International Journal of Audiology. Informa UK Limited. doi:10.1080/14992020701689688.
- Sterns, Richard H., Stephen M. Silver, and John K. Hix. 2015. “Urea for Hyponatremia?”. Kidney International. Elsevier BV. doi:10.1038/ki.2014.320.
- Boscoe, Audra, Clark Paramore, and Joseph G Verbalis. 2006. “Cost of Illness of Hyponatremia in the United States”. Cost Effectiveness and Resource Allocation. Springer Science and Business Media LLC. doi:10.1186/1478-7547-4-10.
- Jaber, Bertrand L., Leena Almarzouqi, Lea Borgi, Victor F. Seabra, Ethan M. Balk, and Nicolaos E. Madias. 2011. “Short-term Efficacy and Safety of Vasopressin Receptor Antagonists for Treatment of Hyponatremia”. The American Journal of Medicine. Elsevier BV. doi:10.1016/j.amjmed.2011.04.028.
- Li, Benlei, Dong Fang, Cheng Qian, Hongliang Feng, and Yanggan Wang. 2016. “The Efficacy and Safety of Tolvaptan in Patients with Hyponatremia: A Meta-analysis of Randomized Controlled Trials”. Clinical Drug Investigation. Springer Science and Business Media LLC. doi:10.1007/s40261-016-0470-3.
- Rondon-Berrios, Helbert, Srijan Tandukar, Maria K. Mor, Evan C. Ray, Filitsa H. Bender, Thomas R. Kleyman, and Steven D. Weisbord. 2018. “Urea for the Treatment of Hyponatremia”. Clinical Journal of the American Society of Nephrology. American Society of Nephrology (ASN). doi:10.2215/cjn.04020318.
- Decaux, G.. 1983. “Treatment of the Syndrome of Inappropriate Secretion of Antidiuretic Hormone by Long Loop Diuretics”. Nephron. S. Karger AG. doi:10.1159/000183052.
- Decaux, Guy, Yves Waterlot, Françoise Genette, and Jean Mockel. 1981. “Treatment of the Syndrome of Inappropriate Secretion of Antidiuretic Hormone with Furosemide”. New England Journal of Medicine. Massachusetts Medical Society. doi:10.1056/nejm198102053040605.
- Jamal, Sophie A, Spyridon Arampatzis, Stephanie Litwack Harrison, Roxana C Bucur, Kristine Ensrud, Eric S Orwoll, and Douglas C Bauer. 2015. “Hyponatremia and Fractures: Findings from the Mros Study”. Journal of Bone and Mineral Research. Wiley. doi:10.1002/jbmr.2383.
- Decaux, Guy, Caroline Andres, Fabrice Gankam Kengne, and Alain Soupart. 2010. “Treatment of Euvolemic Hyponatremia in the Intensive Care Unit by Urea”. Critical Care. Springer Science and Business Media LLC. doi:10.1186/cc9292.
- Schrier, Robert W., Peter Gross, Mihai Gheorghiade, Tomas Berl, Joseph G. Verbalis, Frank S. Czerwiec, and Cesare Orlandi. 2006. “Tolvaptan, a Selective Oral Vasopressin V2-receptor Antagonist, for Hyponatremia”. New England Journal of Medicine. Massachusetts Medical Society. doi:10.1056/nejmoa065181.
- Wallmann HW. Comparison of elderly nonfallers and fallers on performance measures of functional reach, sensory organization, and limits of stability. J Gerontol A Biol Sci Med Sci. 2001 Sep;56(9):M580-3. doi: 10.1093/gerona/56.9.m580.
- Schrier RW, Gross P, Gheorghiade M, Berl T, Verbalis JG, Czerwiec FS, Orlandi C; SALT Investigators. Tolvaptan, a selective oral vasopressin V2-receptor antagonist, for hyponatremia. N Engl J Med. 2006 Nov 16;355(20):2099-112. doi: 10.1056/NEJMoa065181. Epub 2006 Nov 14.
- Decaux G, Genette F. Urea for long-term treatment of syndrome of inappropriate secretion of antidiuretic hormone. Br Med J (Clin Res Ed). 1981 Oct 24;283(6299):1081-3. doi: 10.1136/bmj.283.6299.1081.
- Decaux G, Waterlot Y, Genette F, Mockel J. Treatment of the syndrome of inappropriate secretion of antidiuretic hormone with furosemide. N Engl J Med. 1981 Feb 5;304(6):329-30. doi: 10.1056/NEJM198102053040605. No abstract available.
- Bhandari S, Peri A, Cranston I, McCool R, Shaw A, Glanville J, Petrakova L, O'Reilly K. A systematic review of known interventions for the treatment of chronic nonhypovolaemic hypotonic hyponatraemia and a meta-analysis of the vaptans. Clin Endocrinol (Oxf). 2017 Jun;86(6):761-771. doi: 10.1111/cen.13315. Epub 2017 Mar 27.
- Li B, Fang D, Qian C, Feng H, Wang Y. The Efficacy and Safety of Tolvaptan in Patients with Hyponatremia: A Meta-Analysis of Randomized Controlled Trials. Clin Drug Investig. 2017 Apr;37(4):327-342. doi: 10.1007/s40261-016-0470-3. Erratum In: Clin Drug Investig. 2017 Apr;37(4):411-413.
- Decaux G, Waterlot Y, Genette F, Hallemans R, Demanet JC. Inappropriate secretion of antidiuretic hormone treated with frusemide. Br Med J (Clin Res Ed). 1982 Jul 10;285(6335):89-90. doi: 10.1136/bmj.285.6335.89.
- Boscoe A, Paramore C, Verbalis JG. Cost of illness of hyponatremia in the United States. Cost Eff Resour Alloc. 2006 May 31;4:10. doi: 10.1186/1478-7547-4-10.
- Renneboog B, Musch W, Vandemergel X, Manto MU, Decaux G. Mild chronic hyponatremia is associated with falls, unsteadiness, and attention deficits. Am J Med. 2006 Jan;119(1):71.e1-8. doi: 10.1016/j.amjmed.2005.09.026.
- Corona G, Giuliani C, Verbalis JG, Forti G, Maggi M, Peri A. Hyponatremia improvement is associated with a reduced risk of mortality: evidence from a meta-analysis. PLoS One. 2015 Apr 23;10(4):e0124105. doi: 10.1371/journal.pone.0124105. eCollection 2015. Erratum In: PLoS One. 2016;11(3):e0152846.
- Decaux G. Is asymptomatic hyponatremia really asymptomatic? Am J Med. 2006 Jul;119(7 Suppl 1):S79-82. doi: 10.1016/j.amjmed.2006.05.013.
- Vandergheynst F, Gombeir Y, Bellante F, Perrotta G, Remiche G, Melot C, Mavroudakis N, Decaux G. Impact of hyponatremia on nerve conduction and muscle strength. Eur J Clin Invest. 2016 Apr;46(4):328-33. doi: 10.1111/eci.12597. Epub 2016 Feb 23.
- Zhang X, Zhao M, Du W, Zu D, Sun Y, Xiang R, Yang J. Efficacy and Safety of Vasopressin Receptor Antagonists for Euvolemic or Hypervolemic Hyponatremia: A Meta-Analysis. Medicine (Baltimore). 2016 Apr;95(15):e3310. doi: 10.1097/MD.0000000000003310.
- Borg FG, Laxaback G. Entropy of balance--some recent results. J Neuroeng Rehabil. 2010 Jul 30;7:38. doi: 10.1186/1743-0003-7-38.
- Spasovski G, Vanholder R, Allolio B, Annane D, Ball S, Bichet D, Decaux G, Fenske W, Hoorn EJ, Ichai C, Joannidis M, Soupart A, Zietse R, Haller M, van der Veer S, Van Biesen W, Nagler E; Hyponatraemia Guideline Development Group. Clinical practice guideline on diagnosis and treatment of hyponatraemia. Nephrol Dial Transplant. 2014 Apr;29 Suppl 2:i1-i39. doi: 10.1093/ndt/gfu040. Epub 2014 Feb 25. Erratum In: Nephrol Dial Transplant. 2014 Jun;40(6):924.
- Rondon-Berrios H, Berl T. Mild Chronic Hyponatremia in the Ambulatory Setting: Significance and Management. Clin J Am Soc Nephrol. 2015 Dec 7;10(12):2268-78. doi: 10.2215/CJN.00170115. Epub 2015 Jun 24.
- Decaux G. Treatment of the syndrome of inappropriate secretion of antidiuretic hormone by long loop diuretics. Nephron. 1983;35(2):82-8. doi: 10.1159/000183052. No abstract available.
- Rozen-Zvi B, Yahav D, Gheorghiade M, Korzets A, Leibovici L, Gafter U. Vasopressin receptor antagonists for the treatment of hyponatremia: systematic review and meta-analysis. Am J Kidney Dis. 2010 Aug;56(2):325-37. doi: 10.1053/j.ajkd.2010.01.013. Epub 2010 Jun 9.
- Helbert Rondon Berrios, MD, MS 2022. "Urea for Chronic Hyponatremia". ClinicalTrials.gov. https://clinicaltrials.gov/ct2/show/NCT04588207.
Frequently Asked Questions
How many test subjects are helping researchers with this clinical trial?
"Yes, this is an ongoing study that was originally posted on March 29th, 2022 and updated September 13th, 2022. They are looking for 30 participants at a single site." - Anonymous Online Contributor
What are some key functions of Urea in the body?
"Urea is a common medication for the treatment of psoriasis. It can also help patients with dry eyes, neurodermatitis, and other skin conditions." - Anonymous Online Contributor
What are the investigators of this trial hoping to accomplish?
"The aim of this study, which will run from Baseline to day 42, is to assess the number and proportion of participants who complete the trial. Additionally, secondary outcomes such as change in SF-12 mental component summary (MCS) and physical component summary (PCS), as well as average ratings for medication acceptability will be evaluated." - Anonymous Online Contributor
Are there any unfilled vacancies for this experiment?
"Yes, this study is still looking for patients to enroll. The clinical trial was originally posted on 3/29/2022 and has had a recent update on 9/13/2022 according to the information available on clinicaltrials.gov" - Anonymous Online Contributor
Has the U.S. Food and Drug Administration given their okay to use urea?
"While there is some data affirming Urea's safety, it received a score of 2 because there are no studies yet proving its efficacy." - Anonymous Online Contributor