Spironolactone and hydrochlorothiazide (patient information)
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Kiran Singh, M.D. [2]
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Overview
Spironolactone and hydrochlorothiazide (patient information) is {{{aOrAn}}} diuretic that is FDA approved for the treatment of edematous condition for patients with CHF,cirrhosis of the liver, nephrotic syndrome, essential htn. Common adverse reactions include nausea, vomiting, agranulocytosis, urticaria,hypotension.
Adult Indications and Dosage
FDA-Labeled Indications and Dosage (Adult)
Indication
ALDACTAZIDE is indicated for:
Edematous conditionsfor patients with:
Congestive heart failure:
- For the management of edema and sodium retention when the patient is only partially responsive to, or is intolerant of, other therapeutic measures;
- The treatment of diuretic-induced hypokalemia in patients with congestive heart failure when other measures are considered inappropriate;
- The treatment of patients with congestive heart failure taking digitalis when other therapies are considered inadequate or inappropriate.
Cirrhosis of the liver accompanied by edema and/or ascites:
- Aldosterone levels may be exceptionally high in this condition. ALDACTAZIDE is indicated for maintenance therapy together with bed rest and the restriction of fluid and sodium.
The nephrotic syndrome:
- For nephrotic patients when treatment of the underlying disease, restriction of fluid and sodium intake, and the use of other diuretics do not provide an adequate response.
Essential hypertension:
- For patients with essential hypertension in whom other measures are considered inadequate or inappropriate;
- In hypertensive patients for the treatment of a diuretic-induced hypokalemia when other measures are considered inappropriate;
- ALDACTAZIDE is indicated for the treatment of hypertension, to lower blood pressure. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. These benefits have been seen in controlled trials of antihypertensive drugs from a wide variety of pharmacologic classes, including the classes to which this drug principally belongs. There are no controlled trials demonstrating risk reduction with ALDACTAZIDE.
- Control of high blood pressure should be part of comprehensive cardiovascular risk management, including, as appropriate, lipid control, diabetes management, antithrombotic therapy, smoking cessation, exercise, and limited sodium intake. Many patients will require more than one drug to achieve blood pressure goals. For specific advice on goals and management, see published guidelines, such as those of the National High Blood Pressure Education Program's Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC).
- Numerous antihypertensive drugs, from a variety of pharmacologic classes and with different mechanisms of action, have been shown in randomized controlled trials to reduce cardiovascular morbidity and mortality, and it can be concluded that it is blood pressure reduction, and not some other pharmacologic property of the drugs, that is largely responsible for those benefits. The largest and most consistent cardiovascular outcome benefit has been a reduction in the risk of stroke, but reductions in myocardial infarction and cardiovascular mortality also have been seen regularly.
- Elevated systolic or diastolic pressure causes increased cardiovascular risk, and the absolute risk increase per mmHg is greater at higher blood pressures, so that even modest reductions of severe hypertension can provide substantial benefit. Relative risk reduction from blood pressure reduction is similar across populations with varying absolute risk, so the absolute benefit is greater in patients who are at higher risk independent of their hypertension (for example, patients with diabetes or hyperlipidemia), and such patients would be expected to benefit from more aggressive treatment to a lower blood pressure goal.
- Some antihypertensive drugs have smaller blood pressure effects (as monotherapy) in black patients, and many antihypertensive drugs have additional approved indications and effects (e.g., on angina, heart failure, or diabetic kidney disease). These considerations may guide selection of therapy.
Usage in Pregnancy
- The routine use of diuretics in an otherwise healthy woman is inappropriate and exposes mother and fetus to unnecessary hazard. Diuretics do not prevent development of toxemia of pregnancy, and there is no satisfactory evidence that they are useful in the treatment of developing toxemia.
- Edema during pregnancy may arise from pathologic causes or from the physiologic and mechanical consequences of pregnancy. ALDACTAZIDE is indicated in pregnancy when edema is due to pathologic causes just as it is in the absence of pregnancy (however, see PRECAUTIONS: PREGNANCY). Dependent edema in pregnancy, resulting from restriction of venous return by the expanded uterus, is properly treated through elevation of the lower extremities and use of support hose; use of diuretics to lower intravascular volume in this case is unsupported and unnecessary. There is hypervolemia during normal pregnancy which is not harmful to either the fetus or the mother (in the absence of cardiovascular disease), but which is associated with edema, including generalized edema, in the majority of pregnant women. If this edema produces discomfort, increased recumbency will often provide relief. In rare instances, this edema may cause extreme discomfort that is not relieved by rest. In these cases, a short course of diuretics may provide relief and may be appropriate.
Dosage
Optimal dosage should be established by individual titration of the components.
Edema in adults (congestive heart failure, hepatic cirrhosis, or nephrotic syndrome)
- The usual maintenance dose of ALDACTAZIDE is 100 mg each of spironolactone and hydrochlorothiazide daily, administered in a single dose or in divided doses, but may range from 25 mg to 200 mg of each component daily depending on the response to the initial titration. In some instances it may be desirable to administer separate tablets of either ALDACTONE (spironolactone) or hydrochlorothiazide in addition to ALDACTAZIDE in order to provide optimal individual therapy.
- The onset of diuresis with ALDACTAZIDE occurs promptly and, due to prolonged effect of the spironolactone component, persists for two to three days after ALDACTAZIDE is discontinued.
Essential hypertension
- Although the dosage will vary depending on the results of titration of the individual ingredients, many patients will be found to have an optimal response to 50 mg to 100 mg each of spironolactone and hydrochlorothiazide daily, given in a single dose or in divided doses.
- Concurrent potassium supplementation is not recommended when ALDACTAZIDE is used in the long-term management of hypertension or in the treatment of most edematous conditions, since the spironolactone content of ALDACTAZIDE is usually sufficient to minimize loss induced by the hydrochlorothiazide component.
Off-Label Use and Dosage (Adult)
Guideline-Supported Use
Indications and Dosing
- Ascites - Cirrhosis of liver: maintenance, 100 mg each of spironolactone/hydrochlorothiazide ORALLY per day (range, 25 to 200 mg/day of each component) in single or divided doses, titrated based on clinical response.
- Congestive heart failure - Edema: maintenance, 100 mg each of spironolactone/hydrochlorothiazide ORALLY per day (range, 25 to 200 mg/day of each component) in single or divided doses, titrated based on clinical response.
- Edema - Nephrotic syndrome: maintenance, 100 mg each of spironolactone/hydrochlorothiazide ORALLY per day (range, 25 to 200 mg/day of each component) in single or divided doses, titrated based on clinical response.
- Hypertension: 50 to 100 mg each of spironolactone/hydrochlorothiazide ORALLY per day in single or divided doses, titrated based on clinical response.
- Hypokalemia, Diuretic-induced: 50 to 100 mg each of spironolactone/hydrochlorothiazide ORALLY per day in single or divided doses, titrated based on clinical response.
Non–Guideline-Supported Use
There is limited information regarding Off-Label Non–Guideline-Supported Use of Spironolactone and hydrochlorothiazide (patient information) in adult patients.
Pediatric Indications and Dosage
FDA-Labeled Indications and Dosage (Pediatric)
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) FDA-Labeled Indications and Dosage (Pediatric) in the drug label.
Off-Label Use and Dosage (Pediatric)
Guideline-Supported Use
- Safety and efficacy not established in pediatric patients.
Non–Guideline-Supported Use
There is limited information regarding Off-Label Non–Guideline-Supported Use of Spironolactone and hydrochlorothiazide (patient information) in pediatric patients.
Contraindications
ALDACTAZIDE is contraindicated in patients with anuria, acute renal insufficiency, significant impairment of renal excretory function, hypercalcemia, hyperkalemia, Addison's disease, and in patients who are allergic to thiazide diuretics or to other sulfonamide-derived drugs. ALDACTAZIDE may also be contraindicated in acute or severe hepatic failure.
Warnings
- Potassium supplementation, either in the form of medication or as a diet rich in potassium, should not ordinarily be given in association with ALDACTAZIDE therapy. Excessive potassium intake may cause hyperkalemia in patients receiving ALDACTAZIDE .
- Concomitant administration of ALDACTAZIDE with the following drugs or potassium sources may lead to severe hyperkalemia:
- Other potassium-sparing diuretics
- ACE inhibitors
- Angiotensin II receptor antagonists
- Aldosterone blockers
- Non-steroidal anti-inflammatory drugs (NSAIDs), e.g., indomethacin
- Heparin and low molecular weight heparin
- Other drugs or conditions known to cause hyperkalemia
- Potassium supplements
- Diet rich in potassium
- Salt substitutes containing potassium
- ALDACTAZIDE should not be administered concurrently with other potassium-sparing diuretics. Spironolactone, when used with ACE inhibitors or indomethacin, even in the presence of a diuretic, has been associated with severe hyperkalemia. Extreme caution should be exercised when ALDACTAZIDE is given concomitantly with these drugs.
- ALDACTAZIDE should be used with caution in patients with impaired hepatic function because minor alterations of fluid and electrolyte balance may precipitate hepatic coma.
- Lithium generally should not be given with diuretics.
- Thiazides should be used with caution in severe renal disease. In patients with renal disease, thiazides may precipitate azotemia. Cumulative effects of the drug may develop in patients with impaired renal function.
- Thiazides may add to or potentiate the action of other antihypertensive drugs.
- Sensitivity reactions to thiazides may occur in patients with or without a history of allergy or bronchial asthma.
- Sulfonamide derivatives, including thiazides, have been reported to exacerbate or activate systemic lupus erythematosus.
Acute Myopia and Secondary Angle-Closure Glaucoma
Hydrochlorothiazide, a sulfonamide, can cause an idiosyncratic reaction, resulting in acute transient myopia and acute angle-closure glaucoma. Symptoms include acute onset of decreased visual acuity or ocular pain and typically occur within hours to weeks of drug initiation. Untreated acute angle-closure glaucoma can lead to permanent vision loss. The primary treatment is to discontinue hydrochlorothiazide as rapidly as possible. Prompt medical or surgical treatments may need to be considered if the intraocular pressure remains uncontrolled. Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy
Adverse Reactions
Clinical Trials Experience
The following adverse reactions have been reported and, within each category (body system), are listed in order of decreasing severity.
Hydrochlorothiazide
Body as a whole: Weakness.
Cardiovascular: Hypotension including orthostatic hypotension (may be aggravated by alcohol, barbiturates, narcotics, or antihypertensive drugs).
Digestive: Pancreatitis , jaundice (intrahepatic cholestatic jaundice), diarrhea , vomiting, sialoadenitis, cramping, constipation, gastric irritation, nausea, anorexia.
Eye Disorders: acute myopia and acute angle closure glaucoma .
Hematologic: Aplastic anemia, agranulocytosis, leukopenia, hemolytic anemia, thrombocytopenia.
Hypersensitivity: Anaphylactic reactions, necrotizing angitis (vasculitis and cutaneous vasculitis), respiratory distress including pneumonitis and pulmonary edema, photosensitivity, fever, urticaria, rash, purpura.
Metabolic: Electrolyte imbalance, hyperglycemia, glycosuria, hyperuricemia.
Musculoskeletal: Muscle spasm.
Nervous system/psychiatric: Vertigo, paresthesias, dizziness, headache, restlessness.
Renal: Renal failure, renal dysfunction, interstitial nephritis.
Skin: Erythema multiforme, pruritus.
Special senses: Transient blurred vision, xanthopsia.
Spironolactone
Digestive: Gastric bleeding, ulceration, gastritis, diarrhea and cramping, nausea, vomiting.
Reproductive: Gynecomastia , inability to achieve or maintain erection, irregular menses or amenorrhea, postmenopausal bleeding, breast pain. Carcinoma of the breast has been reported in patients taking spironolactone but a cause and effect relationship has not been established.
Hematologic: Leukopenia (including agranulocytosis), thrombocytopenia.
Hypersensitivity: Fever, urticaria, maculopapular or erythematous cutaneous eruptions, anaphylactic reactions, vasculitis.
Metabolism: Hyperkalemia, electrolyte disturbances .
Musculoskeletal: Leg cramps.
Nervous system/psychiatric: Lethargy, mental confusion, ataxia, dizziness, headache, drowsiness.
Liver/biliary: A very few cases of mixed cholestatic/hepatocellular toxicity, with one reported fatality, have been reported with spironolactone administration.
Renal: Renal dysfunction (including renal failure).
Skin: Stevens-Johnson Syndrome(SJS), toxic epidermal necrolysis (TEN), drug rash with eosinophilia and systemic symptoms (DRESS), alopecia, pruritus
Postmarketing Experience
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Postmarketing Experience in the drug label.
Drug Interactions
- ACE inhibitors, Angiotensin II receptor antagonists, aldosterone blockers, potassium supplements, heparin, low molecular weight heparin, and other drugs known to cause hyperkalemia:
Concomitant administration may lead to severe hyperkalemia.
- Alcohol, barbiturates, or narcotics: Potentiation of orthostatic hypotension may occur.
- Antidiabetic drugs (e.g., oral agents, insulin): Dosage adjustment of the antidiabetic drug may be required.
- Corticosteroids, ACTH: Intensified electrolyte depletion, particularly hypokalemia, may occur.
- Pressor amines (e.g., norepinephrine): Both spironolactone and hydrochlorothiazide reduce the vascular responsiveness to norepinephrine. Therefore, caution should be exercised in the management of patients subjected to regional or general anesthesia while they are being treated with ALDACTAZIDE.
- Skeletal muscle relaxants, nondepolarizing (e.g., tubocurarine): Possible increased responsiveness to the muscle relaxant may result.
- Lithium: Lithium generally should not be given with diuretics. Diuretic agents reduce the renal clearance of lithium and add a high risk of lithium toxicity.
- Nonsteroidal anti-inflammatory drugs (NSAIDs): In some patients, the administration of an NSAID can reduce the diuretic, natriuretic, and antihypertensive effects of loop, potassium-sparing, and thiazide diuretics. Combination of NSAIDs, e.g., indomethacin, with potassium-sparing diuretics has been associated with severe hyperkalemia. Therefore, when ALDACTAZIDE and NSAIDs are used concomitantly, the patient should be observed closely to determine if the desired effect of the diuretic is obtained.
- Digoxin: Spironolactone has been shown to increase the half-life of digoxin. This may result in increased serum digoxin levels and subsequent digitalis toxicity. Monitor serum digoxin levels and adjust dose accordingly. Thiazide-induced electrolyte disturbances, i.e. hypokalemia, hypomagnesemia, increase the risk of digoxin toxicity, which may lead to fatal arrhythmic events.
- Cholestyramine: Hyperkalemic metabolic acidosis has been reported in patients given spironolactone concurrently with cholestyramine.
Use in Specific Populations
Pregnancy
Pregnancy Category (FDA): Teratogenic effects. Pregnancy Category C
Hydrochlorothiazide
- Studies in which hydrochlorothiazide was orally administered to pregnant mice and rats during their respective periods of major organogenesis at doses up to 3000 and 1000 mg hydrochlorothiazide/kg, respectively, provided no evidence of harm to the fetus. There are, however, no adequate and well-controlled studies in pregnant women.
Spironolactone
- Teratology studies with spironolactone have been carried out in mice and rabbits at doses of up to 20 mg/kg/day. On a body surface area basis, this dose in the mouse is substantially below the maximum recommended human dose and, in the rabbit, approximates the maximum recommended human dose. No teratogenic or other embryo-toxic effects were observed in mice, but the 20 mg/kg dose caused an increased rate of resorption and a lower number of live fetuses in rabbits. Because of its antiandrogenic activity and the requirement of testosterone for male morphogenesis, spironolactone may have the potential for adversely affecting sex differentiation of the male during embryogenesis. When administered to rats at 200 mg/kg/day between gestation days 13 and 21 (late embryogenesis and fetal development), feminization of male fetuses was observed. Offspring exposed during late pregnancy to 50 and 100 mg/kg/day doses of spironolactone exhibited changes in the reproductive tract including dose-dependent decreases in weights of the ventral prostate and seminal vesicle in males, ovaries and uteri that were enlarged in females, and other indications of endocrine dysfunction, that persisted into adulthood. There are no adequate and well-controlled studies with ALDACTAZIDE in pregnant women. Spironolactone has known endocrine effects in animals including progestational and antiandrogenic effects. The antiandrogenic effects can result in apparent estrogenic side effects in humans, such as gynecomastia. Therefore, the use of ALDACTAZIDE in pregnant women requires that the anticipated benefit be weighed against the possible hazards to the fetus.
Non-teratogenic effects
Spironolactone or its metabolites may, and hydrochlorothiazide does, cross the placental barrier and appear in cord blood. Therefore, the use of ALDACTAZIDE in pregnant women requires that the anticipated benefit be weighed against possible hazards to the fetus. The hazards include fetal or neonatal jaundice, thrombocytopenia, and possibly other adverse reactions that have occurred in adults.
Pregnancy Category (AUS):
There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Spironolactone and hydrochlorothiazide (patient information) in women who are pregnant.
Labor and Delivery
There is no FDA guidance on use of Spironolactone and hydrochlorothiazide (patient information) during labor and delivery.
Nursing Mothers
- Canrenone, a major (and active) metabolite of spironolactone, appears in human breast milk. Because spironolactone has been found to be tumorigenic in rats, a decision should be made whether to discontinue the drug, taking into account the importance of the drug to the mother. If use of the drug is deemed essential, an alternative method of infant feeding should be instituted.
- Thiazides are excreted in human milk in small amounts. Thiazides when given at high doses can cause intense diuresis which can in turn inhibit milk production. The use of ALDACTAZIDE during breast feeding is not recommended. If ALDACTAZIDE is used during breast feeding, doses should be kept as low as possible.
Pediatric Use
Safety and effectiveness in pediatric patients have not been established.
Geriatic Use
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) in geriatric settings.
Gender
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) with respect to specific gender populations.
Race
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) with respect to specific racial populations.
Renal Impairment
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) in patients with renal impairment.
Hepatic Impairment
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) in patients with hepatic impairment.
Females of Reproductive Potential and Males
There is no FDA guidance on the use of Spironolactone and hydrochlorothiazide (patient information) in women of reproductive potentials and males.
Immunocompromised Patients
There is no FDA guidance one the use of Spironolactone and hydrochlorothiazide (patient information) in patients who are immunocompromised.
Administration and Monitoring
Administration
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Administration in the drug label.
Monitoring
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Monitoring in the drug label.
IV Compatibility
There is limited information regarding the compatibility of Spironolactone and hydrochlorothiazide (patient information) and IV administrations.
Overdosage
- The oral LD50 of spironolactone is greater than 1000 mg/kg in mice, rats, and rabbits. The oral LD50 of hydrochlorothiazide is greater than 10 g/kg in both mice and rats.
- Acute overdosage of spironolactone may be manifested by drowsiness, mental confusion, maculopapular or erythematous rash, nausea, vomiting, dizziness, or diarrhea. Rarely, instances of hyponatremia, hyperkalemia (less commonly seen with ALDACTAZIDE because the hydrochlorothiazide component tends to produce hypokalemia), or hepatic coma may occur in patients with severe liver disease, but these are unlikely due to acute overdosage.
- However, because ALDACTAZIDE contains both spironolactone and hydrochlorothiazide, the toxic effects may be intensified, and signs of thiazide overdosage may be present. These include electrolyte imbalance such as hypokalemia and/or hyponatremia. The potassium-sparing action of spironolactone may predominate and hyperkalemia may occur, especially in patients with impaired renal function. BUN determinations have been reported to rise transiently with hydrochlorothiazide. There may be CNS depression with lethargy or even coma.
Treatment Induce vomiting or evacuate the stomach by lavage. There is no specific antidote. Treatment is supportive to maintain hydration, electrolyte balance, and vital functions.
Patients who have renal impairment may develop spironolactone-induced hyperkalemia. In such cases, ALDACTAZIDE should be discontinued immediately. With severe hyperkalemia, the clinical situation dictates the procedures to be employed. These include the intravenous administration of calcium chloride solution, sodium bicarbonate solution, and/or the oral or parenteral administration of glucose with a rapid-acting insulin preparation. These are temporary measures to be repeated as required. Cationic exchange resins such as sodium polystyrene sulfonate may be orally or rectally administered. Persistent hyperkalemia may require dialysis.
Pharmacology
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Pharmacology in the drug label.
Mechanism of Action
- ALDACTAZIDE is a combination of two diuretic agents with different but complementary mechanisms and sites of action, thereby providing additive diuretic and antihypertensive effects. Additionally, the spironolactone component helps to minimize the potassium loss characteristically induced by the thiazide component.
- The diuretic effect of spironolactone is mediated through its action as a specific pharmacologic antagonist of aldosterone, primarily by competitive binding of receptors at the aldosterone-dependent sodium-potassium exchange site in the distal convoluted renal tubule. Hydrochlorothiazide promotes the excretion of sodium and water primarily by inhibiting their reabsorption in the cortical diluting segment of the distal renal tubule.
- ALDACTAZIDE is effective in significantly lowering the systolic and diastolic blood pressure in many patients with essential hypertension, even when aldosterone secretion is within normal limits.
- Both spironolactone and hydrochlorothiazide reduce exchangeable sodium, plasma volume, body weight, and blood pressure. The diuretic and antihypertensive effects of the individual components are potentiated when spironolactone and hydrochlorothiazide are given concurrently.
Structure
- ALDACTAZIDE oral tablets contain:
spironolactone . . . . . . . . . . . . . . . . . . . . 25 mg hydrochlorothiazide . . . . . . . . . . . . . . . . 25 mg
or
spironolactone . . . . . . . . . . . . . . . . . . . . 50 mg hydrochlorothiazide . . . . . . . . . . . . . . . . 50 mg
- Spironolactone (ALDACTONE®), an aldosterone antagonist, is 17-hydroxy-7α-mercapto-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone acetate and has the following structural formula:
- Spironolactone is practically insoluble in water, soluble in alcohol, and freely soluble in benzene and in chloroform.
- Hydrochlorothiazide, a diuretic and antihypertensive, is 6-chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide 1,1-dioxide and has the following structural formula:
- Hydrochlorothiazide is slightly soluble in water and freely soluble in sodium hydroxide solution.
- Inactive ingredients include calcium sulfate, corn starch, flavor, hydroxypropyl cellulose, hypromellose, iron oxide, magnesium stearate, polyethylene glycol, povidone, and titanium dioxide.
Pharmacodynamics
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Pharmacodynamics in the drug label.
Pharmacokinetics
- Spironolactone is rapidly and extensively metabolized. Sulfur-containing products are the predominant metabolites and are thought to be primarily responsible, together with spironolactone, for the therapeutic effects of the drug. The following pharmacokinetic data were obtained from 12 healthy volunteers following the administration of 100 mg of spironolactone (ALDACTONE film-coated tablets) daily for 15 days. On the 15th day, spironolactone was given immediately after a low fat breakfast and blood was drawn thereafter.
- The pharmacological activity of spironolactone metabolites in man is not known. However, in the adrenalectomized rat the antimineralocorticoid activities of the metabolites C, TMS, and HTMS, relative to spironolactone, were 1.10, 1.28, and 0.32, respectively. Relative to spironolactone, their binding affinities to the aldosterone receptors in rat kidney slices were 0.19, 0.86, and 0.06, respectively.
- In humans, the potencies of TMS and 7-α-thiospirolactone in reversing the effects of the synthetic mineralocorticoid, fludrocortisone, on urinary electrolyte composition were 0.33 and 0.26, respectively, relative to spironolactone. However, since the serum concentrations of these steroids were not determined, their incomplete absorption and/or first-pass metabolism could not be ruled out as a reason for their reduced in vivo activities.
- Spironolactone and its metabolites are more than 90% bound to plasma proteins. The metabolites are excreted primarily in the urine and secondarily in bile.
- The effect of food on spironolactone absorption (two 100 mg ALDACTONE tablets) was assessed in a single dose study of 9 healthy, drug-free volunteers. Food increased the bioavailability of unmetabolized spironolactone by almost 100%. The clinical importance of this finding is not known.
- Hydrochlorothiazide is rapidly absorbed following oral administration. Onset of action of hydrochlorothiazide is observed within one hour and persists for 6 to 12 hours. Hydrochlorothiazide plasma concentrations attain peak levels at one to two hours and decline with a half-life of four to five hours. Hydrochlorothiazide undergoes only slight metabolic alteration and is excreted in urine. It is distributed throughout the extracellular space, with essentially no tissue accumulation except in the kidney.
Nonclinical Toxicology
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Nonclinical Toxicology in the drug label.
Clinical Studies
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Clinical Studies in the drug label.
How Supplied
- ALDACTAZIDE tablets containing 25 mg of spironolactone (ALDACTONE) and 25 mg of hydrochlorothiazide are round, tan, film coated, with SEARLE and 1011 debossed on one side and ALDACTAZIDE and 25 on the other side, supplied as:
NDC Number Size
0025-1011-31 bottle of 100
- ALDACTAZIDE tablets containing 50 mg of spironolactone (ALDACTONE) and 50 mg of hydrochlorothiazide are oblong, tan, scored, film coated, with SEARLE and 1021 debossed on the scored side and ALDACTAZIDE and 50 on the other side, supplied as:
NDC Number Size
0025-1021-31 bottle of 100
Storage
Store below 77°F (25°C).
Images
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Patient Counseling Information
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Patient Counseling Information in the drug label.
Precautions with Alcohol
Alcohol-Spironolactone and hydrochlorothiazide (patient information) interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.
Brand Names
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Brand Names in the drug label.
Look-Alike Drug Names
There is limited information regarding Spironolactone and hydrochlorothiazide (patient information) Look-Alike Drug Names in the drug label.
Drug Shortage Status
Price
References
The contents of this FDA label are provided by the National Library of Medicine.
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IMPORTANT WARNING:
Spironolactone has caused tumors in laboratory animals. Talk to your doctor about the risks and benefits of using this medicine for your condition.
Why is this medication prescribed
The combination of spironolactone and hydrochlorothiazide, a 'water pill,' is used to treat high blood pressure and fluid retention caused by various conditions, including heart disease. It causes the kidneys to eliminate unneeded water and salt from the body into the urine.
This medicine is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
How should this medicine be used
The combination of spironolactone and hydrochlorothiazide comes as a tablet to take by mouth. It usually is taken once a day in the morning with food. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take spironolactone and hydrochlorothiazide exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
This medication controls high blood pressure but does not cure it. Continue to take spironolactone and hydrochlorothiazide even if you feel well. Do not stop taking spironolactone and hydrochlorothiazide without talking to your doctor.
What special precautions should I follow
Before taking spironolactone and hydrochlorothiazide:
- tell your doctor and pharmacist if you are allergic to spironolactone, hydrochlorothiazide, sulfa drugs, or any other drugs.
- tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially aspirin; captopril (Capoten); digoxin (Lanoxin); enalapril (Vasotec); lisinopril (Prinivil, Zestril); lithium (Eskalith, Lithobid); medications for arthritis, diabetes, or high blood pressure; potassium supplements; and vitamins. Do not take this medicine if you are taking amiloride or triamterene.
- tell your doctor if you have or have ever had diabetes, gout, or kidney or liver disease.
- tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking spironolactone and hydrochlorothiazide, call your doctor.
- if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking spironolactone and hydrochlorothiazide.
- you should know that this drug may make you drowsy. Do not drive a car or operate machinery until you know how this drug affects you.
- remember that alcohol can add to the drowsiness caused by this drug.
What special dietary instructions should I follow
Follow your doctor's directions for a low-salt or low-sodium diet and daily exercise program. Avoid potassium-containing salt substitutes. Limit your intake of potassium-rich foods (e.g., bananas, prunes, raisins, and orange juice). Ask your doctor for advice on how much of these foods you may have.
What should I do if I forget a dose? Return to top Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
Side effects
Mild side effects
Spironolactone and hydrochlorothiazide may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- upset stomach
- vomiting
- diarrhea
- loss of appetite
- stomach pain
- gas
- frequent urination
- dizziness
- headache
- enlarged or painful breasts
- irregular menstrual periods
- drowsiness
Severe side effects
If you experience any of the following symptoms, call your doctor immediately:
- muscle weakness or cramps
- rapid, excessive weight loss
- fatigue
- slow or irregular heartbeat
- sore throat
- unusual bruising or bleeding
- yellowing of the skin or eyes
- skin rash
- vomiting blood
- fever
- confusion
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/MedWatch/report.htm] or by phone [1-800-332-1088].
What storage conditions are needed for this medicine
Keep this medicine in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medicine that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medicine.
In case of emergency/overdose
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
What other information should I know
Keep all appointments with your doctor and the laboratory. Your blood pressure should be checked regularly, and blood tests should be done occasionally.
Do not let anyone else take your medicine. Ask your pharmacist any questions you have about refilling your prescription.
Brand names
- Aldactazide®
- Spironazide®
- Spirozide®