Metolazone 10 mg Tablet, 100-count
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Thiazide-like Diuretic class.
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🏭 Manufacturer & labeler
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🩺 Clinical
Metolazone, is used to reduce the swelling and fluid retention caused by heart failure or kidney disease. It also is used alone or with other medications to treat high blood pressure. Metolazone is in a class of medications called diuretics ('water pills'). It causes the kidneys to reduce the amount of water and salt in the body by increasing the amount of urine.
Read the full MedlinePlus article ↗- Think of your kidneys as a filter. Normally, they reabsorb a lot of the sodium (salt) that passes through them. Metolazone blocks that process, so more sodium — and the water that...
- What is metolazone actually doing in my body?
- Because metolazone makes your kidneys flush out more than just water — it also causes you to lose potassium, sodium, and magnesium. If those levels drop too low, you can develop mu...
- Why does my doctor keep checking my blood levels while I'm on this?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Metolazone — tap one for details:
Metolazone may be associated with lower levels of 8 nutrients — worth a chat with your pharmacist, not a cause for alarm.
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Ask a licensed pharmacist directly — free, answered by our team.
💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII H77VEI93A8
A synthetic yellow dye used to color medications. It helps identify the drug and make it visually distinctive, with no effect on how the medicine works.
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UNII 70097M6I30
Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
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UNII ETJ7Z6XBU4
Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
4 inactive ingredients listed in the exact product block matched to this NDC.
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ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.380 | $38.02 / 100 tablets |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · Q2 2026 | $0.6266 | $62.66 / 100 tablets |
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🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Metolazone 10 mg 00185-5600-01 | Sandoz | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 00378-6174-01 | Mylan | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 50742-0351-01 | Ingenus | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mgthis 58657-0742-01 | Method | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 58657-0942-01 | Method | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 62332-0534-31 | Alembic | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 69292-0566-01 | Amici | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 72888-0054-01 | Advagen | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 76385-0138-01 | Unichem | 100 tablets | $0.380 | AB | Availability likely | — |
| Metolazone 10 mg 10135-0767-01 | Marlex | 100 tablets | — | AB | FDA listed | — |
| Metolazone 10 mg 42571-0418-01 | Micro | 100 tablets | — | AB | Discontinued | — |
| Metolazone 10 mg 46708-0534-31 | Alembic | 100 tablets | — | AB | FDA listed | — |
| Metolazone 10 mg 51407-0433-01 | Golden | 100 tablets | — | AB | FDA listed | — |
| Metolazone 10 mg 72162-2391-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
| Metolazone 10 mg 81005-0126-01 | Aarkish | 100 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
Top reported reactions
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 58657-0742-01 You're viewing this | 100 TABLET in 1 BOTTLE (58657-742-01) | $0.3802 / ea | $38.02 | 2024-06-15 | Active |
| 58657-0742-10 | 1000 TABLET in 1 BOTTLE (58657-742-10) | — | — | 2024-06-15 | Active |
You're viewing the smallest of 2 pack sizes for this product.
Pack size FAQ
What quantity is in NDC 58657-0742-01?
What is the difference between NDC 58657-0742-01 and NDC 58657-0742-10?
What NDC number is used to bill for this package of Metolazone 10 mg Tablet?
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Metolazone tablets, USP, are indicated for the treatment of salt and water retention including: · edema accompanying congestive heart failure; · edema accompanying renal diseases, including the nephrotic syndrome and states of diminished renal function. Metolazone tablets, USP, are also indicated for the treatment of hypertension, alone or in combination with other antihypertensive drugs of a different class. MYKROX Tablets, a more rapidly available form of metolazone, are intended for the treatment of new patients with mild to moderate hypertension.
A dose titration is necessary if MYKROX Tablets are to be substituted for metolazone tablets, USP, in the treatment of hypertension. See package circular for MYKROX Tablets. 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 evidence that they are useful in the treatment of developed toxemia. Edema during pregnancy may arise from pathologic causes or from the physiologic and mechanical consequences of pregnancy. Metolazone tablets, USP, are indicated in pregnancy when edema is due to pathologic causes, just as it is in the absence of pregnancy (see PRECAUTIONS ).
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 illogical and unnecessary. There is hypervolemia during normal pregnancy which is harmful to neither the fetus nor 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 which is not relieved by rest. In these cases, a short course of diuretics may be appropriate.
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION Effective dosage of metolazone tablets, USP, should be individualized according to indication and patient response. A single daily dose is recommended. Therapy with metolazone tablets, USP, should be titrated to gain an initial therapeutic response and to determine the minimal dose possible to maintain the desired therapeutic response.
Usual Single Daily Dosage Schedules Suitable initial dosages will usually fall in the ranges given. Edema of cardiac failure: Metolazone tablets, USP, 5 to 20 mg once daily. Edema of renal disease: Metolazone tablets, USP, 5 to 20 mg once daily.
Mild to moderate essential hypertension: Metolazone tablets, USP, 2½ to 5 mg once daily. New patients – MYKROX Tablets (metolazone tablets, USP) (see MYKROX package circular). If considered desirable to switch patients currently on metolazone tablets, USP, to MYKROX, the dose should be determined by titration starting at one tablet (½ mg) once daily and increasing to two tablets (1 mg) once daily if needed.
Treatment Of Edematous States The time interval required for the initial dosage to produce an effect may vary. Diuresis and saluresis usually begin within one hour and persist for 24 hours or longer. When a desired therapeutic effect has been obtained, it may be advisable to reduce the dose if possible.
The daily dose depends on the severity of the patient's condition, sodium intake, and responsiveness. A decision to change the daily dose should be based on the results of thorough clinical and laboratory evaluations. If antihypertensive drugs or diuretics are given concurrently with metolazone tablets, USP, more careful dosage adjustment may be necessary.
For patients who tend to experience paroxysmal nocturnal dyspnea, it may be advisable to employ a larger dose to ensure prolongation of diuresis and saluresis for a full 24-hour period. Treatment Of Hypertension The time interval required for the initial dosage regimen to show effect may vary from three or four days to three to six weeks in the treatment of elevated blood pressure. Doses should be adjusted at appropriate intervals to achieve maximum therapeutic effect.
⛔ Contraindications ▾
CONTRAINDICATIONS Anuria, hepatic coma or precoma, known allergy or hypersensitivity to metolazone.
⚠️ Warnings ▾
WARNINGS Rapid Onset Hyponatremia And/Or Hypokalemia Rarely, the rapid onset of severe hyponatremia and/or hypokalemia has been reported following initial doses of thiazide and non-thiazide diuretics. When symptoms consistent with severe electrolyte imbalance appear rapidly, drug should be discontinued and supportive measures should be initiated immediately. Parenteral electrolytes may be required.
Appropriateness of therapy with this class of drugs should be carefully reevaluated. Hypokalemia Hypokalemia may occur with consequent weakness, cramps, and cardiac dysrhythmias. Serum potassium should be determined at regular and appropriate intervals, and dose reduction, potassium supplementation or addition of a potassium-sparing diuretic instituted whenever indicated.
Hypokalemia is a particular hazard in patients who are digitalized or who have or have had a ventricular arrhythmia; dangerous or fatal arrhythmias may be precipitated. Hypokalemia is dose related. Concomitant Therapy Lithium In general, diuretics should not be given concomitantly with lithium because they reduce its renal clearance and add a high risk of lithium toxicity.
Read prescribing information for lithium preparations before use of such concomitant therapy. Furosemide Unusually large or prolonged losses of fluids and electrolytes may result when metolazone tablets, USP, are administered concomitantly to patients receiving furosemide (see PRECAUTIONS , Drug Interactions ). Other Antihypertensive Drugs When metolazone tablets, USP, are used with other antihypertensive drugs, particular care must be taken to avoid excessive reduction of blood pressure, especially during initial therapy.
Cross-Allergy Cross-allergy may occur when metolazone tablets, USP, are given to patients known to be allergic to sulfonamide-derived drugs, thiazides, or quinethazone. Sensitivity Reactions Sensitivity reactions (e.g., angioedema, bronchospasm) may occur with or without a history of allergy or bronchial asthma and may occur with the first dose of metolazone tablets, USP.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS Metolazone tablets, USP, are usually well tolerated, and most reported adverse reactions have been mild and transient. Many of metolazone tablets, USP, related adverse reactions represent extensions of its expected pharmacologic activity and can be attributed to either its antihypertensive action or its renal/metabolic actions. The following adverse reactions have been reported.
Several are single or comparably rare occurrences. Adverse reactions are listed in decreasing order of severity within body systems. Cardiovascular Chest pain/discomfort, orthostatic hypotension, excessive volume depletion, hemoconcentration, venous thrombosis, palpitations.
Central And Peripheral Nervous System Syncope, neuropathy, vertigo, paresthesias, psychotic depression, impotence, dizziness/lightheadedness, drowsiness, fatigue, weakness, restlessness (sometimes resulting in insomnia), headache. Dermatologic/Hypersensitivity Toxic epidermal necrolysis (TEN), Stevens-Johnson Syndrome, necrotizing angiitis (cutaneous vasculitis), skin necrosis, purpura, petechiae, dermatitis (photosensitivity), urticaria, pruritus, skin rashes. Gastrointestinal Hepatitis, intrahepatic cholestatic jaundice, pancreatitis, vomiting, nausea, epigastric distress, diarrhea, constipation, anorexia, abdominal bloating, abdominal pain.
Hematologic Aplastic/hypoplastic anemia, agranulocytosis, leukopenia, thrombocytopenia. Metabolic Hypokalemia, hyponatremia, hyperuricemia, hypochloremia, hypochloremic alkalosis, hyperglycemia, glycosuria, increase in serum urea nitrogen (BUN) or creatinine, hypophosphatemia, hypomagnesemia, hypercalcemia. Musculoskeletal Joint pain, acute gouty attacks, muscle cramps or spasm.
Other Transient blurred vision, chills, dry mouth. In addition, adverse reactions reported with similar antihypertensive-diuretics, but which have not been reported to date for metolazone tablets, USP, include: bitter taste, sialadenitis, xanthopsia, respiratory distress (including pneumonitis), and anaphylactic reactions. These reactions should be considered as possible occurrences with clinical usage of metolazone tablets, USP.
Whenever adverse reactions are moderate or severe, metolazone tablets, USP, dosage should be reduced or therapy withdrawn. To report SUSPECTED ADVERSE REACTIONS, contact Innogenix, LLC. at 1-844-466-6469 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
🆘 Overdosage ▾
OVERDOSAGE Intentional overdosage has been reported rarely with metolazone and similar diuretic drugs. Signs And Symptoms Orthostatic hypotension, dizziness, drowsiness, syncope, electrolyte abnormalities, hemoconcentration and hemodynamic changes due to plasma volume depletion may occur. In some instances depressed respiration may be observed.
At high doses, lethargy of varying degree may progress to coma within a few hours. The mechanism of CNS depression with thiazide overdosage is unknown. Also, GI irritation and hypermotility may occur.
Temporary elevation of BUN has been reported, especially in patients with impairment of renal function. Serum electrolyte changes and cardiovascular and renal function should be closely monitored. Treatment There is no specific antidote available but immediate evacuation of stomach contents is advised.
Dialysis is not likely to be effective. Care should be taken when evacuating the gastric contents to prevent aspiration, especially in the stuporous or comatose patient. Supportive measures should be initiated as required to maintain hydration, electrolyte balance, respiration, and cardiovascular and renal function.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Metolazone is a quinazoline diuretic, with properties generally similar to the thiazide diuretics. The actions of metolazone result from interference with the renal tubular mechanism of electrolyte reabsorption. Metolazone acts primarily to inhibit sodium reabsorption at the cortical diluting site and to a lesser extent in the proximal convoluted tubule.
Sodium and chloride ions are excreted in approximately equivalent amounts. The increased delivery of sodium to the distal tubular exchange site results in increased potassium excretion. Metolazone does not inhibit carbonic anhydrase.
A proximal action of metolazone has been shown in humans by increased excretion of phosphate and magnesium ions and by a markedly increased fractional excretion of sodium in patients with severely compromised glomerular filtration. This action has been demonstrated in animals by micropuncture studies. When metolazone tablets, USP, are given, diuresis and saluresis usually begin within one hour and may persist for 24 hours or more.
For most patients, the duration of effect can be varied by adjusting the daily dose. High doses may prolong the effect. A single daily dose is recommended.
When a desired therapeutic effect has been obtained, it may be possible to reduce dosage to a lower maintenance level. The diuretic potency of metolazone tablets, USP, at maximum therapeutic dosage is approximately equal to thiazide diuretics. However, unlike thiazides, metolazone tablets, USP, may produce diuresis in patients with glomerular filtration rates below 20 mL/min.
Metolazone tablets, USP, and furosemide administered concurrently have produced marked diuresis in some patients where edema or ascites was refractory to treatment with maximum recommended doses of these or other diuretics administered alone. The mechanism of this interaction is unknown (see WARNINGS and PRECAUTIONS , Drug Interactions ). Maximum blood levels of metolazone are found approximately eight hours after dosing.
A small fraction of metolazone is metabolized. Most of the drug is excreted in the unconverted form in the urine.
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Metolazone Tablets, USP for oral administration are available as: 2.5 mg: Peach, round, biconvex tablets debossed with “I” on one side and “121” on the other side and supplied as: NDC 58657-740-01 bottles of 100 NDC 58657-740-10 bottles of 1000 NDC 58657-940-01 Carton of 100 tablets (10 tablets per blister pack x 10) 5 mg: Pink, round, biconvex tablets debossed with “I” on one side and “122” on the other side and supplied as: NDC 58657-741-01 bottles of 100 NDC 58657-741-10 bottles of 1000 NDC 58657-941-01 Carton of 100 tablets (10 tablets per blister pack x 10) 10 mg: Orange, round, biconvex tablets debossed with “I” on one side and “123” on the other side and supplied as: NDC 58657-742-01 bottles of 100 NDC 58657-742-10 bottles of 1000 NDC 58657-942-01 Carton of 100 tablets (10 tablets per blister pack x 10) STORAGE: Store at 20° to 25°C (68° to 77°F); excursions permitted to 15°- 30°C (59°- 86°F) [See USP Controlled Room Temperature] Protect from light.
Keep out of the reach of children. Dispense contents in a tight, light-resistant container as defined in the USP with a child-resistant closure, as required. Distributed by: Method Pharmaceutials, LLC Southlake, TX 76092 All brandnames are trademarks of their respective owners.
Rev. 01/2026
📋 Description ▾
DESCRIPTION Metolazone tablets, USP, for oral administration contain 2½, 5, or 10 mg of metolazone, USP, a diuretic/saluretic/antihypertensive drug of the quinazoline class. Metolazone has the molecular formula C 16 H 16 ClN 3 O 3 S, the chemical name 7-chloro-1,2, 3, 4-tetrahydro-2-methyl-3-(2-methylphenyl)-4- oxo-6-quinazolinesulfonamide and a molecular weight of 365.83. The structural formula is: Metolazone is only sparingly soluble in water, but more soluble in plasma, blood, alkali, and organic solvents.
Inactive Ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose and dye: 2 ½ mg o. 6; 5 mg - D&C Red #30; 10 mg - FD&C Yellow No.6. Structure