NDC 53002-1623-00 — CHLORTHALIDONE 25 mg Tablet, 100-count

🆔 Identity & classification

FDA NDC (as labeled) 53002-1623-0

Product NDC 53002-1623

11-digit billing NDC 53002162300

Application # ANDA206904

SPL Set ID 9b5c2ff4-d427-4f37-826a-7bac6abad735

Established class (EPC) Increased Diuresis [PE], Thiazide-like Diuretic

DEA schedule Non-controlled

Marketing category ANDA

Marketing status Discontinued

FDA listing status Inactivated by FDA (certified through Dec 2024)

Route ORAL

Dosage form TABLET

Substance CHLORTHALIDONE

TE code (Orange Book) AB · RLD · RS

Why two NDCs? The FDA registers this code as 53002-1623-0 — a 5-4-1 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the package segment → 53002-1623-00. Same drug, same package — only the format differs.

Where does this data come from?

Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

🏭 Manufacturer & labeler

LabelerRPK Pharmaceuticals, Inc.

Application holderINGENUS PHARMACEUTICALS LLC

FDA applicationANDA206904 (ANDA)

Labeler code53002

Product typeHuman Prescription Drug

🔎 All NDCs from RPK Pharmaceuticals, Inc.

The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).

Where does this data come from?

Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

🩺 Clinical

📗 Our plain-language guide HelloPharmacist

Chlorthalidone is a water pill — it helps your kidneys remove extra salt and fluid from your body. That lowers the pressure inside your blood vessels, which is why it's used for hi...
What exactly is chlorthalidone supposed to do for me?
Take it in the morning with food — that's the standard recommendation. Taking it in the morning means the increased urination it causes happens during the day while you're awake, r...
Should I take it in the morning or at night, and does it matter if I eat?

📖 Read our full Chlorthalidone guide →

Patient education

📘 MedlinePlus patient leaflet ↗

Supplement & herbal interactions

Some supplements/herbs that may interact with Chlorthalidone — tap one for details:

Activated CharcoalMajor Coffee CharcoalModerate European MandrakeModerate GlucomannanModerate Guar GumModerate Gum ArabicModerate Slippery ElmModerate TragacanthModerate

🌿 Every supplement checked against Chlorthalidone (222 interactions) — ranked by severity →

8

Nutrient depletion considerations

Chlorthalidone may be associated with lower levels of 8 nutrients — worth a chat with your pharmacist, not a cause for alarm.

POTASSIUM Major Depletion VITAMIN C Insignificant Depletion MAGNESIUM Moderate Depletion THIAMINE Moderate Depletion ZINC Moderate Depletion +3 more

🧪 Full Chlorthalidone nutrient depletion report →

An association is not a deficiency. Educational only — don't start or stop anything without professional guidance.

Where does this data come from?

Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

💊 What it looks like

Color Green

ShapeRound

Imprint010

Size5 mm

ScoringNot scored

One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.

Where does this data come from?

Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

🧪 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.

UNII 776XM7047L
Calcium stearate is a white powder derived from stearic acid and calcium. It works as a lubricant and glidant to help the medicine flow smoothly during manufacturing and prevent ingredients from sticking to equipment.
UNII 35SW5USQ3G
A synthetic yellow dye used to color medicines. It helps make tablets, capsules, and liquids visually distinct so patients can easily identify their medication.
UNII H3R47K3TBD
FD&C Blue No. 1 is a synthetic blue dye approved for use in foods and medicines. It serves as a colorant to give the medication its distinctive appearance and help with product identification.
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.
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.
UNII AG9B65PV6B
A starch derivative made from corn that helps tablets and capsules break apart quickly when swallowed. It acts as a disintegrant, allowing the medicine to dissolve and be absorbed in your stomach and intestines.
UNII O8232NY3SJ
A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.

7 inactive ingredients listed in the exact product block matched to this NDC.

Where does this data come from?

Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — 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

Are inactive ingredients the same for every manufacturer?

No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.

Why might an inactive ingredient be missing?

Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.

Can inactive ingredients matter?

Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

💲 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 each	Per package
Retail pharmacies payNADAC · weekly	Not in the retail survey — common for institutional, discontinued, or low-volume packs.
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 · quarterly	No Part D plan price is available for this NDC in our data.

ℹ️

No price is published for this exact package yet. CMS surveys NADAC per package size, so a different pack of the same drug often has one.

Try another pack size: 30 tablets

Where does this data come from?

NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

🔁 Therapeutic equivalents

Product	Labeler	Pack	NADAC/unit	TE	Status	Price vs. this
Chlorthalidone 25 mgthis 53002-1623-00	RPK	100 tablets	—	AB	Discontinued	—

About this product: this is a generic version of the medicine. FDA equivalence ratings are shown when available, and other versions are listed above, least expensive first.

Where does this data come from?

Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

⏳ Availability & generic status

📍

2026

Currently FDA-listed

listed with the FDA

🔓

·

Generic on the market

this product is a generic

✅This is a generic drug

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?

Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

📊 Medicare Part D spend CMS · PART D · 2026 (Q1)

Medicare Part D (outpatient prescription) spending for Chlorthalidone — the program that covers self-administered drugs. 16 manufacturers.

⚠️ Drug-level data: CMS publishes Part D spending by drug, not by NDC — these figures combine every manufacturer, strength and package size sold under the name Chlorthalidone. That’s a different level of aggregation than the Medicaid card above, which is specific to this exact 11-digit NDC (pack size included), so the two aren’t directly comparable.

Period

Total Part D spend

$11.31M

Claims incl. refills

733.1K

Beneficiaries

591.5K

Spend / beneficiary

$19.13

Spend / claim

$15.43

Trend by period

💵 About the dollar figures: spending is what Part D plans paid before confidential manufacturer rebates, so the program’s real net cost is lower. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part D Spending by Drug (data.cms.gov), updated quarterly.

🔬 Reported adverse events (FAERS)

Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for Chlorthalidone — the ingredient across all brands.

Top reported reactions

Nausea1,258

Fatigue1,063

Diarrhoea849

Dizziness758

Headache715

Pain697

Dyspnoea665

Age at onset

Child1

Adolescent5

Adult1,324

Elderly1,411

Reporter sex

Reports over time (by year) — tap or hover for the count & year

Most recent year is provisional (FAERS lags ~3 months).

Where does this data come from?

Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.

📦 Packaging — all sizes for this product

Package NDC	Description	Marketing start	Status
53002-1623-00 You're viewing this	100 TABLET in 1 BOTTLE (53002-1623-0)	2017-09-01	Inactivated by FDA
53002-1623-03	30 TABLET in 1 BOTTLE (53002-1623-3)	2017-09-01	Inactivated by FDA

You're viewing the largest of 2 pack sizes for this product.

Pack size FAQ

What quantity is in NDC 53002-1623-00?

NDC 53002-1623-00 is a 100-count package — 100 tablet in 1 bottle.

What is the difference between NDC 53002-1623-00 and NDC 53002-1623-03?

Both are CHLORTHALIDONE 25 mg Tablet — the drug itself is identical. NDC 53002-1623-00 is the 100-count package, while NDC 53002-1623-03 is the 30 tablets package.

What NDC number is used to bill for this package of CHLORTHALIDONE 25 mg Tablet?

Bill NDC 53002-1623-00 — the 11-digit billing format is 53002162300. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

🧭 About this NDC listing & data coverage

Finished prescription product No longer marketed (per FDA listing data)

What data is (and isn’t) available for this NDC — tap to expand

NDC identity (package / product / labeler codes)	✓ Available
Labeler	✓ Available
Product & package description	✓ Available
Marketing category & status	✓ Available
Active ingredient / dosage form / route	✓ Available
FDA label (SPL via DailyMed)	✓ Available
Package photos	✓ Available
Inactive ingredients (structured)	✓ Available
NADAC pharmacy acquisition price (CMS)	— Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data	✓ Available
HCPCS J-code billing crosswalk	— Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD)	— Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.

“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Why is there no price listed?

The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.

What does the discontinued status mean for this NDC?

The labeler reported a marketing end date (or the listing was delisted), so this specific package is no longer actively marketed. Remaining stock may still be dispensed for a time, and the NDC stays valid for historical records and claims — but data feeds (pricing, labeling) typically stop updating for it. Other package sizes or other manufacturers' versions of the same medication may still be marketed — see the equivalents section where available.

Is the NDC printed on the package the same as the 11-digit billing NDC?

Yes, they identify this exact package in different formats. The FDA registers it as 53002-1623-0, which is what is printed on the packaging and shown on DailyMed. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero: 53002-1623-00, written without dashes as 53002162300. The Identity section at the top of this page lists every form of this code.

What do the three segments of this NDC mean?

In 53002-1623-00, the first segment (53002) is the labeler code FDA assigned to RPK Pharmaceuticals, Inc.; the middle segment (1623) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (00) identifies this exact package size and type. Together they name one specific package of one specific product.

Does this product come in other package sizes?

Yes — the FDA directory lists 1 other package presentation of this same product, including 30 tablets (53002-1623-03). Each has its own NDC and its own page — see the package list near the top of this page.

Who lists this product with the FDA?

RPK Pharmaceuticals, Inc. is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.

Do I need a prescription for this product?

This NDC is listed with FDA as a prescription product, so it is dispensed under a prescriber's order. Your pharmacist can tell you whether any over-the-counter forms of the same medication exist.

This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.

Where does this data come from?

Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.

📄 Full prescribing information FDA SPL

The complete FDA label for this product — the official prescribing information, verbatim, section by section. Jump with a chip, search within the label, or expand everything.

🎯 Indications and Usage ⏱️ Dosage and Administration ⛔ Contraindications ⚠️ Warnings 🤒 Adverse Reactions 🔄 Drug Interactions 🔄 Drug / Laboratory Test Interactions 🤰 Pregnancy 🧒 Pediatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 📦 How Supplied / Storage and Handling 📋 Description 💬 Information for Patients

🎯 Indications and Usage ~1 min read ▾

INDICATIONS AND USAGE: Diuretics such as chlorthalidone are indicated in the management of hypertension either as the sole therapeutic agent or to enhance the effect of other antihypertensive drugs in the more severe forms of hypertension. Chlorthalidone is indicated as adjunctive therapy in edema associated with congestive heart failure, hepatic cirrhosis, and corticosteroid and estrogen therapy. Chlorthalidone has also been found useful in edema due to various forms of renal dysfunction, such as nephrotic syndrome, acute glomerulonephritis, and chronic renal failure.

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 developed toxemia. Edema during pregnancy may arise from pathologic causes or from the physiologic and mechanical consequences of pregnancy.

Chlorthalidone is indicated in pregnancy when edema is due to pathologic causes, just as it is in the absence of pregnancy (however, see PRECAUTIONS, below). 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 that is harmful to neither the fetus nor the mother (in the absence of cardiovascular disease), but that 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 be appropriate.

⏱️ Dosage and Administration ~1 min read ▾

DOSAGE AND ADMINISTRATION: Therapy should be initiated with the lowest possible dose. This dose should be titrated according to individual patient response to gain maximal therapeutic benefit while maintaining lowest dosage possible. A single dose given in the morning with food is recommended; divided daily doses are unnecessary.

Hypertension Initiation: Therapy, in most patients, should be initiated with a single daily dose of 25 mg. If the response is insufficient after a suitable trial, the dosage may be increased to a single daily dose of 50 mg. If additional control is required, the dosage of chlorthalidone may be increased to 100 mg once daily or a second antihypertensive drug (step 2 therapy) may be added.

Dosage above 100 mg daily usually does not increase effectiveness. Increases in serum uric acid and decreases in serum potassium are dose-related over the 25 to 100 mg/day range. Maintenance: Maintenance doses may be lower than initial doses and should be adjusted according to individual patient response.

Effectiveness is well sustained during continued use. Edema Initiation: Adults, initially 50 to 100 mg daily, or 100 mg on alternate days. Some patients may require 150 to 200 mg at these intervals or up to 200 mg daily.

Dosages above this level, however, do not usually produce a greater response. Maintenance: Maintenance doses may often be lower than initial doses and should be adjusted according to individual patient response. Effectiveness is well sustained during continued use.

⛔ Contraindications 10 words ▾

CONTRAINDICATIONS: Anuria. Known hypersensitivity to chlorthalidone or other sulfonamide-derived drugs.

⚠️ Warnings 111 words ▾

WARNINGS: Chlorthalidone should be used with caution in severe renal disease. In patients with renal disease, chlorthalidone or related drugs may precipitate azotemia. Cumulative effects of the drug may develop in patients with impaired renal function.

Chlorthalidone should be used with caution in patients with impaired hepatic function or progressive liver disease, since minor alterations of fluid and electrolyte balance may precipitate hepatic coma. Sensitivity reactions may occur in patients with a history of allergy or bronchial asthma. The possibility of exacerbation or activation of systemic lupus erythematosus has been reported with thiazide diuretics, which are structurally related to chlorthalidone.

However, systemic lupus erythematosus has not been reported following chlorthalidone administration.

🤒 Adverse Reactions 131 words ▾

ADVERSE REACTIONS: To report SUSPECTED ADVERSE REACTIONS, please call RiconPharma LLC at 1-877-748-1970 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. The following adverse reactions have been observed, but there is not enough systematic collection of data to support an estimate of their frequency. Gastrointestinal System Reactions: anorexia, gastric irritation, nausea, vomiting, cramping, diarrhea, constipation, jaundice (intrahepatic cholestatic jaundice), pancreatitis.

Central Nervous System Reactions: dizziness, vertigo, paresthesias, headache, xanthopsia. Hematologic Reactions: leukopenia, agranulocytosis, thrombocytopenia, aplastic anemia. Dermatologic-Hypersensitivity Reactions: purpura, photosensitivity, rash, urticaria, necrotizing angiitis (vasculitis, cutaneous vasculitis), Lyell’s syndrome (toxic epidermal necrolysis).

Cardiovascular Reactions: orthostatic hypotension may occur and may be aggravated by alcohol, barbiturates, or narcotics. Other Adverse Reactions: hyperglycemia, glycosuria, hyperuricemia, muscle spasm, weakness, restlessness, impotence. Whenever adverse reactions are moderate or severe, chlorthalidone dosage should be reduced or therapy withdrawn

🔄 Drug Interactions 126 words ▾

Drug Interactions Chlorthalidone may add to or potentiate the action of other antihypertensive drugs. Potentiation occurs with ganglionic peripheral adrenergic blocking drugs. Medication such as digitalis may also influence serum electrolytes.

Warning signs, irrespective of cause, are: dryness of mouth, thirst, weakness, lethargy, drowsiness, restlessness, muscle pains or cramps, muscular fatigue, hypotension, oliguria, tachycardia, and gastrointestinal disturbances such as nausea and vomiting. Insulin requirements in diabetic patients may be increased, decreased, or unchanged. Higher dosage of oral hypoglycemic agents may be required.

Latent diabetes mellitus may become manifest during chlorthalidone administration. Chlorthalidone and related drugs may increase the responsiveness to tubocurarine. Chlorthalidone and related drugs may decrease arterial responsiveness to norepinephrine.

This diminution is not sufficient to preclude effectiveness of the pressor agent for therapeutic use.

🔄 Drug / Laboratory Test Interactions 17 words ▾

Drug/Laboratory Test Interactions Chlorthalidone and related drugs may decrease serum PBI levels without signs of thyroid disturbance.

🤰 Pregnancy 129 words ▾

Pregnancy Teratogenic Effects. Pregnancy Category B Reproduction studies have been performed in the rat and the rabbit at doses up to 420 times the human dose and have revealed no evidence of harm to the fetus due to chlorthalidone. There are, however, no adequate and well-controlled studies in pregnant women.

Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. Nonteratogenic Effects Thiazides cross the placental barrier and appear in cord blood. The use of chlorthalidone and related drugs in pregnant women requires that the anticipated benefits of the drug be weighed against possible hazards to the fetus.

These hazards include fetal or neonatal jaundice, thrombocytopenia, and possibly other adverse reactions that have occurred in the adult.

🧒 Pediatric Use 11 words ▾

Pediatric Use Safety and effectiveness in children has not been established.

🆘 Overdosage 71 words ▾

OVERDOSAGE: Symptoms of acute overdosage include nausea, weakness, dizziness, and disturbances of electrolyte balance. The oral LD 50 of the drug in the mouse and the rat is more than 25,000 mg/kg body weight. The minimum lethal dose (MLD) in humans has not been established.

There is no specific antidote, but gastric lavage is recommended, followed by supportive treatment. Where necessary, this may include intravenous dextrose-saline with potassium, administered with caution.

🧬 Clinical Pharmacology 217 words ▾

CLINICAL PHARMACOLOGY: Chlorthalidone is an oral diuretic with prolonged action (48–72 hours) and low toxicity. The major portion of the drug is excreted unchanged by the kidneys. The diuretic effect of the drug occurs in approximately 2.6 hours and continues for up to 72 hours.

The mean half-life following a 50 to 200 mg dose is 40 hours. In the first order of absorption, the elimination half-life is 53 hours following a 50 mg dose, and 60 hours following a 100 mg dose. Approximately 75 percent of the drug is bound to plasma proteins, 58 percent of the drug being bound to albumin.

This is caused by an increased affinity of the drug to erythrocyte carbonic anhydrase. Nonrenal routes of elimination have yet to be clarified. Data are not available regarding percentage of dose as unchanged drug and metabolites, concentration of the drug in body fluids, degree of uptake by a particular organ or in the fetus, or passage across the blood-brain barrier.

The drug produces copious diuresis with greatly increased excretion of sodium and chloride. At maximal therapeutic dosage, chlorthalidone is approximately equal in its diuretic effect to comparable maximal therapeutic doses of benzothiadiazine diuretics. The site of action appears to be the cortical diluting segment of the ascending limb of Henle’s loop of the nephron.

📦 How Supplied / Storage and Handling 18 words ▾

HOW SUPPLIED: Product: 53002-1623 NDC: 53002-1623-3 30 TABLET in a BOTTLE NDC: 53002-1623-0 100 TABLET in a BOTTLE

📋 Description 110 words ▾

DESCRIPTION: Chlorthalidone is an oral antihypertensive/diuretic. It is a monosulfamyl diuretic that differs chemically from thiazide diuretics in that a double-ring system is incorporated in its structure. It is 2-chloro-5(1-hydroxy-3-oxo-1- isoindolinyl) benzenesulfonamide with the following structural formula: Molecular Formula: C 14 H 11 CIN 2 O 4 S Molecular Weight: 338.76 Chlorthalidone, USP is practically insoluble in water, in ether, and in chloroform; soluble in methanol; slightly soluble in ethanol.

Chlorthalidone tablets are available containing either 25 mg or 50 mg of chlorthalidone USP and the following inactive ingredients: Calcium Stearate, Colloidal Silicon Dioxide, D&C Yellow #10, FD&C Blue #1, Microcrystalline Cellulose, Pregelatinized Starch (Maize), and Sodium Starch Glycolate. image

💬 Information for Patients 103 words ▾

Information for Patients Patients should inform their physician if they have: (1) had an allergic reaction to chlorthalidone or other diuretics or have asthma, (2) kidney disease, (3) liver disease, (4) gout, (5) systemic lupus erythematosus, or (6) been taking other drugs such as cortisone, digitalis, lithium carbonate, or drugs for diabetes. Patients should be cautioned to contact their physician if they experience any of the following symptoms of potassium loss: excess thirst, tiredness, drowsiness, restlessness, muscle pains or cramps, nausea, vomiting, or increased heart rate or pulse.

Patients should also be cautioned that taking alcohol can increase the chance of dizziness occurring.

Glossary — plain-language definitions of medical terms used in this label:

exacerbation: A flare-up or worsening of a condition.

systemic lupus erythematosus: A long-term autoimmune disease in which the immune system attacks the body's own tissues, affecting joints, skin, kidneys, and other organs.

Absorption: How a medicine moves from where it is taken, such as the stomach or gut, into the bloodstream.

adjunctive therapy: A medicine added alongside a main treatment to help it work better.

Adverse Reactions: Unwanted or harmful effects that people experienced while taking a medicine, listed on its official label.

agranulocytosis: A severe drop in a certain type of infection-fighting white blood cell, greatly raising the risk of serious infections.

anemia: A low level of red blood cells or the oxygen-carrying protein inside them, which can cause tiredness, weakness, and paleness.

animal reproduction studies: Tests in pregnant animals used to check whether a medicine might harm a developing baby.

anorexia: Loss of appetite, or not feeling hungry (on a drug label this means reduced appetite, not the eating disorder).

antidote: A treatment that reverses or counteracts the effects of a specific medicine or poison.

anuria: Producing little or no urine, which can be a sign of severe kidney problems.

aplastic anemia: A serious condition where the bone marrow stops making enough new blood cells.

cirrhosis: Long-term scarring of the liver that gradually replaces healthy tissue and reduces how well the liver works.

Clinical Pharmacology: The label section explaining how a medicine works in the body and how the body processes it.

constipation: Having bowel movements less often than usual, or passing stools that are hard, dry, and difficult to move.

Contraindications: A list of situations or health conditions in which a medicine should not be used because the chance of harm is too high.

diarrhea: Loose, watery bowel movements that happen more often than normal.

Dosage and Administration: The label section explaining how much of a medicine to use and how to take or give it.

Drug Interactions: The label section listing other medicines, foods, or substances that can change how a medicine works or raise the chance of side effects.

edema: Swelling caused by extra fluid trapped in the body's tissues.

electrolyte: A mineral in the blood and body fluids, such as sodium, potassium, or calcium, that carries a small electric charge and helps the body work.

Elimination: The overall removal of a medicine from the body by breaking it down and passing it out.

Excretion: How the body removes a medicine or its leftover pieces, mainly through the urine or stool.

glycosuria: Sugar (glucose) in the urine, which often happens when blood sugar is high.

gout: A type of arthritis with sudden, painful, swollen joints caused by uric acid crystals.

Half-life: The time it takes for the amount of medicine in the blood to drop by half.

heart failure: A condition in which the heart cannot pump blood as well as it should, causing tiredness, breathlessness, and swelling.

hyperglycemia: High blood sugar, meaning there is more glucose (sugar) in the blood than normal.

hypersensitivity: An overreaction of the body's defense system to a substance, causing symptoms such as rash, swelling, or trouble breathing.

hypertension: Blood pressure that stays higher than normal, commonly called high blood pressure.

hyperuricemia: A higher-than-normal level of uric acid in the blood, which can lead to gout.

hypotension: Blood pressure that is lower than normal, which can cause dizziness or fainting.

Indications and Usage: The label section stating which medical conditions the FDA has officially approved the medicine to treat, prevent, or manage.

intravenous: Given directly into a vein through a needle or thin tube; often written as IV.

jaundice: Yellowing of the skin and the whites of the eyes caused by too much bilirubin in the blood.

lethargy: A state of tiredness and sluggishness, often with slowed thinking or movement.

leukopenia: A low level of white blood cells, the cells that help the body fight off infections.

NDC: A unique number that identifies a specific medicine, its maker, strength, and package size.

neonatal: Relating to a newborn baby during its first four weeks of life.

oliguria: Producing much less urine than normal, which is often a sign the kidneys are under stress.

orthostatic hypotension: A drop in blood pressure when you stand up from sitting or lying down, which can cause brief dizziness.

Overdosage: The label section describing what can happen if too much of a medicine is taken and how it may be treated.

pancreatitis: Painful swelling of the pancreas, an organ behind the stomach that helps digest food and control blood sugar.

photosensitivity: An unusually strong skin reaction, such as burning or rash, after being in sunlight or other ultraviolet light.

potentiate: To make the effect of one medicine stronger by taking another substance along with it.

pregnancy category: An older letter rating (A, B, C, D, or X) once used to describe a medicine's possible risk during pregnancy.

purpura: Purple spots or patches on the skin caused by bleeding just under the surface.

restlessness: An inability to stay calm or still, with a constant feeling of needing to move.

tachycardia: A faster-than-normal heart rate, usually over 100 beats per minute.

teratogenic: Able to cause physical birth defects in a developing baby when a medicine is taken during pregnancy.

thrombocytopenia: A low level of platelets, the blood cells that help form clots, which can lead to easier bruising or bleeding.

toxic epidermal necrolysis: A rare, life-threatening reaction in which large areas of the top layer of skin blister and peel away, like a severe burn.

urticaria: Raised, itchy welts on the skin, commonly called hives.

vertigo: A spinning sensation that makes you feel like you or the room around you is moving.

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

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