Our results show that symptoms from thiazideinduced hyponatremia primarily. The presence of neurologic signs is an indication for active sodium replacement. Son francisco, california from the nephrology section, department of medicine, veterans administration medical center and the university of california school of medicine, san francisco, california. Thiazide diuretics are one of the most widely used and cost. Thiazides are very commonly used for the treatment of hypertension and are recommended by the seventh report of the joint national committee on prevention, detection, evaluation and treatment of high blood pressure jnc 7 as first. To determine whether a singledose of thiazide administered to patients with previous thiazideinduced hyponatremia will cause hyponatremia and, if so, to analyze its pathogenesis. Thiazideassociated hyponatremia, report of the hyponatremia. Clinical studies thiazide induced hyponatremia associated with death or neurologic damage in outpatients nasim ashraf, m. The hyponatremia developed within 14 days in most of the patients receiving thiazides but in none of the patients who were treated with furosemide. Hyponatremia is usually induced within 2 weeks of starting the thiazide diuretic, but it can occur any time during thiazide therapy when subsequent contributory factors are complicated, such as. This clinic has about patients with hypertension, and tds.
However, taking into consideration that thiazides may aggravate the hyponatremia induced by siadh, an evaluation is a prudent ap. I cannot agree with the treatment regimen for diureticinduced hyponatremia advocated in the editorial by j. Thiazide diuretic induced hyponatremia is an important adverse effect, with significant clinical impact, such as delirium and falls, and limits the use of these potent antihypertensive agents. The onset of thiazideinduced hyponatremia may in some cases occur. Hypertension affects more than 30% of the worlds adult population and thiazide and thiazidelike diuretics are amongst the most widely used. Hyponatremia is an uncommon, but serious, complication of diuretic therapy. A total of 40 consecutive patients with tdinduced hyponatremia over the period of 1218 months will be recruited for this study from the renal htn clinic at the ottawa hospital. Severe and symptomatic hyponatremia requires urgent management, usually requiring infusion of normal or hypertonic saline. Risk of thiazide induced hyponatremia in patients with hypertension. Dec 01, 2017 of these, the mechanism of thiazide induced hyponatremia tih is poorly understood. We report a case of a 28yearold man with hiv human immunodeficiency virus and pneumocystis pneumonia who developed hyponatremia while receiving trimethoprimsulfamethoxazole tmpsmx. Reproducibility by single dose rechallenge and an analysis of pathogenesis.
Most patients with druginduced hyponatraemia are asymptomatic and the. The onset of thiazide induced hyponatremia may in some cases occur. Clinical and genetic factors associated with thiazideinduced. With increasing polypharmacy and an ageing population, the prevalence of drug induced hyponatraemia is likely to increase. There are little data on the effect or safety of protein supplementation and also on whether a. Since then, many others have come to the same conclusion that thiazide diuretics will sporadically induce hyponatremia, even with a short duration of medical administration. Eleven patients with thiazideinduced kaluril hydrochlorothiazide, 50 mg. Thiazideinduced hyponatraemia is associated with increased. For these reasons, fixeddose arb thiazide combination antihypertensive drugs have been widely used for the treatment of hypertension. Clinical and molecular features of thiazideinduced hyponatremia. Most patients with drug induced hyponatraemia are asymptomatic and the.
Nov 15, 2018 hyponatremia is an occasional but potentially fatal complication of diuretic therapy. Patients with thiazideinduced hyponatremia are at high risk for a recurrence and should not be rechallenged with a thiazide. It is common in older adults, and increasing age is associated with a marked increase in the incidence of. Risk was greater in women than men, was greater at higher diuretic dose, and was greater in patients with low bmi. The risk factors for the development of thiazideassociated hyponatremia are shown in table 1. Thiazide induced hyponatremia is one of the main causes of decreased sodium levels in elderly individuals. In contrast, loop diuretics are implicated much less commonly 7. Hence, tah occurs in a heterogeneous group of patients, and thiazides may not be directly responsible in all instances. Hyponatremia is a recognized complication of treatment with thiazide. Thiazides induced hyponatremia is usually chronic and should be corrected slowly as risk of ods is high. Among the various causes of druginduced hyponatremia, thiazideinduced hyponatremia comprises a main cause, while loop diuretics only occasionally induce. Women have a more than 3 times higher risk to be hospitalized due to diuretic induced hyponatremia than men. A loop diuretic is much less likely to induce this problem unless the diuretic has induced volume depletion 8 or water intake is very high since loop diuretics partially impair urinary diluting capacity.
Thiazide diureticinduced hyponatremia is an important adverse effect, with significant clinical impact, such as delirium and falls, and limits the use of these potent antihypertensive agents. Because, on average, the elderly take more medications, as our population ages the incidence of druginduced hyponatremia will likely increase. Interestingly tih is reproducible with drug rechallenge in some patients the hyponatremia can be induced with a single dose in susceptible patients. In the present study, we analyzed differences in thiazide associated hyponatremia between men and women and between different categories of age, body mass index bmi, daily thiazide dose, and estimated glomerular filtration rate. Sep 26, 2007 although drugs are a common cause of hyponatremia, other causes should be considered. Trimethoprimassociated hyponatremia american journal of. While cases of thiazideinduced hyponatremia are well documented, this severity of. Thiazideassociated hyponatremia is observed mainly in patients with cer. Thiazideinduced hyponatremia associated with death or neurologic damage in outpatients. Prospective controlled study comparing patients with previous thiazide induced hyponatremia with two control groups. The number needed to harm to result in one excess case of hyponatremia in 5 years is approximately 15. Thiazideinduced hyponatremia is predictable american journal of. Carlos ayus, md, in the july issue of the archives.
Although drugs are a common cause of hyponatremia, other causes should be considered. Mineralocorticoid deficiency associated hyponatremia is chronic and responsds to 0. Hydrochlorothiazide is a cheap and effective antihypertensive agent but may cause hyponatremia. While cases of thiazide induced hyponatremia are well documented, this severity of. The higher water intake and lower urea excretion in patients points to an important role for polydipsia and ureamediated water excretion in the. Virtually all cases of severe diuretic induced hyponatremia have been due to a thiazide type diuretic 17. The importance of thiazide induced hyponatremia tih is reemerging because thiazide diuretic prescription seems to be increasing after the guidelines recommending thiazides as firstline treatment of essential hypertension have been introduced.
Additional risk factors associated with symptomatic. Clinical studies thiazideinduced hyponatremia associated with death or neurologic damage in outpatients nasim ashraf, m. Usually this electrolyte disorder develops insidiously, the degree of hyponatremia is modest, the patient is asymptomatic, and it improves after cessation of treatment. Risk of thiazideinduced hyponatremia in patients with. Apr 17, 2012 leung aa, wright a, pazo v, karson a, bates dw. Of these, 118 met criteria for true thiazideinduced hyponatremia tih. You have free access to this content the journal of clinical hypertension volume 10, issue 6, article first published online.
Considerable attention is paid to the problem of thiazide. Hyponatremia associated with diuretic use can be clinically difficult to differentiate from the syndrome of inappropriate antidiuretic hormone secretion siadh. Hyponatremia is one of the most common adverse reactions to thiazide diuretics. The thiazide drug class was discovered and developed at merck and co. Weiss, md, college of medicine, university of arizona hypokalemia is one of the most common electrolyte disorders seen in both outpatient practice and inpatient care. There are little data on the effect or safety of protein supplementation and also on whether a trial of this is feasible. Thiazide diuretics are among the most widely used treatments for hypertension, but thiazide induced hyponatremia tih, a clinically significant adverse effect, is poorly understood. Prospective controlled study comparing patients with previous thiazideinduced hyponatremia with two control groups. Of these, the mechanism of thiazide induced hyponatremia tih is poorly understood. A decrement in the serunm concentration of sodium is a common complication of diuretic therapy. Diuretics are a common cause of hyponatremia, as first was reported almost 50 years ago. Thiazide diureticcaused hyponatremia in the elderly. Thiazide diuretics were first introduced in 1957 and soon became recognized as a cause of hyponatremia. Thiazideinduced hyponatremia in the postoperative total.
Severe thiazideinduced hyponatraemia during treatment with. Thiazide diuretics work at the site of the distal tubule by inhibiting uptake of sodium and chloride. A loop diuretic is much less likely to induce this problem unless the diuretic has induced volume depletion 8 or water intake is very high since. Certain drugs eg, diuretics, antidepressants, and antiepileptics. A minority of patients develop thiazideinduced hyponatremia tih and this is. Thiazide associated hyponatremia is observed mainly in patients with cer.
Even though several risk factors for hydrochlorothiazideinduced hyponatremia have been reported, this study aimed to evaluate additional risk factors for hydrochlorothiazideinduced hyponatremia in hypertensive patients. Hyponatremia is an occasional but potentially fatal complication of diuretic therapy. Leung et al risk of thiazideinduced hyponatremia 1065. The silent epidemic of thiazideinduced hyponatremia mann. For these reasons, fixeddose arbthiazide combination antihypertensive drugs have been widely used for the treatment of hypertension. Severe hyponatremia as a result of thiazide diuretic. Hyponatraemia is the most frequent electrolyte disorder in clinical practice.
Severe hyponatremia associated with the use of angiotensin ii. The higher water intake and lower urea excretion in patients points to an important role for polydipsia and ureamediated water excretion in the pathogenesis of thiazide induced hyponatraemia. Rapid average correction of hyponatremia and a relatively high total correction over 20 meql in the first 24 h were significantly associated with higher mortality or demyelinating syndrome. Hypertension affects more than 30% of the worlds adult population and thiazide and thiazidelike diuretics are amongst the most widely used, effective, and least costly treatments available, with allcause mortality benefits equivalent to angiotensinconverting enzyme inhibitors or calcium channel antagonists. Jun 30, 2010 hyponatremia is usually induced within 2 weeks of starting the thiazide diuretic, but it can occur any time during thiazide therapy when subsequent contributory factors are complicated, such as reduction of renal function with aging, ingestion of other drugs that affect free water clearance, or changes in water or sodium intake. The risk of thiazideinduced hyponatremia persists even up to 10 years of treatment. Severe symptomatic hyponatremia in elderly outpatients. Hyponatremia is often found in the early stages of diuretic therapy17,18. Hyponatremia is a recognized complication of treatment with thiazide diuretics, particularly in patients older than 70 years. Eleven patients with thiazide induced kaluril hydrochlorothiazide, 50 mg. Here, we have studied the phenotypic and genetic characteristics of patients hospitalized with tih.
Thiazide induced hyponatremia, a detailed phenotypic and. Thiazideinduced hyponatremia associated with death or. Severe hyponatremia associated with the use o f angiotensin. Drug induced hyponatraemia is commonly associated with diuretics, selective serotonin reuptake inhibitors and antiepileptics. Thiazide induced hyponatremia is this weeks version of. Department of internal medicine, school of medicine, university of ioannina, ioannina, greece.
Jun 15, 2003 thiazide diuretics work at the site of the distal tubule by inhibiting uptake of sodium and chloride. This observation is probably derived from the different nephronal sites of action of these two classes of diuretics. Jci phenotypic and pharmacogenetic evaluation of patients. Thiazides however have a significant side effect profile and are frequently insufficient. Pdf the importance of thiazideinduced hyponatremia tih is reemerging because thiazide diuretic prescription seems to be increasing after the. Apr 10, 2018 hypertension affects more than 30% of the worlds adult population and thiazide and thiazidelike diuretics are amongst the most widely used, effective, and least costly treatments available, with allcause mortality benefits equivalent to angiotensinconverting enzyme inhibitors or calcium channel antagonists. Risk factors for thiazideinduced hyponatraemia qjm.
Thiazides are very commonly used for the treatment. Diureticinduced hyponatremia jama internal medicine jama. W risk of thiazideinduced hyponatremia in patients with hypertension. Druginduced hyponatraemia is commonly associated with diuretics, selective serotonin reuptake inhibitors and antiepileptics.
Virtually all cases of severe diureticinduced hyponatremia have been due to a thiazidetype diuretic 6 12. The hazard ratio for thiazideassociated hyponatremia varied from 2. Hyponatremia is usually induced within 2 weeks of starting the thiazide diuretic, but it can occur any time during thiazide therapy when subsequent contributory factors are complicated, such as reduction of renal function with aging, ingestion of other drugs that affect free water clearance, or changes in water or sodium intake. Thiazide diuretics are among the most widely used treatments for hypertension, but thiazideinduced hyponatremia tih, a clinically significant adverse effect, is poorly understood. Because, on average, the elderly take more medications, as our population ages the incidence of drug induced hyponatremia will likely increase. With increasing polypharmacy and an ageing population, the prevalence of druginduced hyponatraemia is likely to increase. Thiazideinduced hyponatremia is a common complication following thiazide treatment. Thiazide induced hyponatremia is this weeks version of spooky sodium. Thiazide diuretics are associated with markedly impaired free water excretion at low adh and aqp2 in elderly patients. Get a printable copy pdf file of the complete article 992k, or click on a page. Thiazideinduced hyponatremia is one of the main causes of decreased sodium levels in elderly individuals. Diureticinducedn hyponatremia jama internal medicine. Risk of thiazideinduced hyponatremia in patients with hypertension. Women have a more than 3 times higher risk to be hospitalized due to diureticinduced hyponatremia than men.
Thiazides increased hyponatremia, but not hospitalizations. However, there have not been many studies done regarding cases where patients under such regimens showed severe hyponatremia, even when the amount of thiazide included was low. Hyponatremia and thiazides, journal of clinical hypertension. Virtually all cases of severe diureticinduced hyponatremia have been due to a thiazidetype diuretic 17. There were a total of 522 patients who developed hyponatremia during the study period, of which 32. To find the cause, it may be helpful to assess the fluid status and plasma osmonality of the patient. Tih occur in up to 15% of treated adults and is one of the most common causes of severe hyponatremia in adults. The importance of thiazideinduced hyponatremia tih is reemerging because thiazide diuretic prescription seems to be increasing after the guidelines recommending thiazides as firstline treatment of essential hypertension have been introduced.
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