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Contepo fosfomycin disodium 6 g Injection, Powder, For Solution, 12 vials

by Meitheal Pharmaceuticals Inc. · 12 VIAL, GLASS in 1 CARTON (71288-035-52) / 1 INJECTION, POWDER, FOR SOLUTION in 1 VIAL, GLASS (71288-035-51)
NDC 71288-0035-52
🏷️ FDA NDC (as labeled) 71288-035-52 billing pads the product segment with a zero
Rx only Brand On market Non-controlled
🗂️ Data synced Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

🆔 Identity & classification

FDA NDC (as labeled) 71288-035-52
Product NDC 71288-035
11-digit billing NDC 71288003552
NCPDP billing unit EA — each (per item)
RxCUI 2725577, 2725582
UNII 97MMO19FNO
Application # NDA212271
SPL Set ID 855574f2-39f8-43bc-a3d2-79dbb578cb94
DEA schedule Non-controlled
Marketing category NDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2025-10-22
Route INTRAVENOUS
Dosage form INJECTION, POWDER, FOR SOLUTION
Substance FOSFOMYCIN SODIUM
GPI-14 16000023202155
GCN Seq No 088377
GCN 58503
HICL code 013223
Ingredient (HICL) Fosfomycin Disodium
HIC1 code W
Therapeutic class — broad (HIC1) Anti-Infecting Agents
HIC2 code W2
Therapeutic class — intermediate (HIC2) Antibacterials
HIC3 code W2G
Therapeutic class — specific (HIC3) Antibiotic, Antibacterial, Misc.
AHFS code 08:36.00.00
AHFS class Urinary Anti-Infectives
FDB label name CONTEPO 6 GRAM VIAL
FDB brand name Contepo
Legend status F — Federal legend — prescription drug or device
Why two NDCs? The FDA registers this code as 71288-035-52 — a 5-3-2 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 product segment → 71288-0035-52. 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.

🏷️ RxNorm drug class

This medicine belongs to the Other antibacterials class.

Drug family (ATC) Other antibacterials, Antiinfectives
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

🏭 Manufacturer & labeler

LabelerMeitheal Pharmaceuticals Inc.
Application holderMEITHEAL PHARMACEUTICALS INC
FDA applicationNDA212271 (NDA)
Labeler code71288
First marketedOct 2025
Product typeHuman Prescription Drug
Portfolio158 products on file
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

Label name CONTEPO 6 GRAM VIAL Ingredient Fosfomycin Disodium
📗 Our plain-language guide HelloPharmacist
  • That depends on the type of infection and which form of fosfomycin you're being prescribed. The oral powder or solution (brands like Monurol or Fosfomycin Tromethamine) is a single...
  • What kind of UTI is fosfomycin used for — and is it right for me?
  • You pour the entire contents of the single sachet into about half a cup (3–4 ounces) of cool water, stir until it dissolves completely, and drink it right away. Don't use hot water...
  • How do I take the oral powder — do I need water or food?
📖 Read our full Fosfomycin guide →

Supplement & herbal interactions

🌿 Drug–supplement interaction checker →
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.

🧪 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 AB6MNQ6J6L
    Succinic acid is an organic acid derived from natural sources or chemical synthesis. In medications, it functions as a buffer to help maintain the proper pH level and may also serve as a preservative or flavor enhancer in formulations.

1 inactive ingredient 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 systemPer mLPer 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.
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

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Contepo 6 gthis 71288-0035-52 Meitheal 12 vials — — FDA listed —
About this product: this is the brand-name version. We did not find an FDA-approved generic match for this exact strength, form and route.
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

🏛️
2025
First FDA approval
Oct 2025
📍
2026
Currently FDA-listed
1 year listed
🛡️
2039
Latest patent/protection listed
not a guaranteed launch date
🔒No FDA-approved generic found

We did not find an FDA-approved generic match for this exact strength, form and route. Patent/protection dates below may affect future generic timing.

🛡️ Latest patent/protection date listed: FDA patent/protection data lists protections through Jan 2039. This may affect when a full generic version becomes widely available, but it is not a guaranteed launch date.
📅 FDA approved Oct 22, 2025 RLD RS ⏳ ~12.4 yr to latest listed protection

Why the date isn’t exact: Generic timing can change because patents may be challenged, settled, licensed, added, removed, or worked around with a narrower label — and FDA approval does not always mean a pharmacy can get the generic today.

Patents & exclusivity — FDA Orange Book
US 11541064 — method of use (U-4331)
US 10086006 — method of use (U-4332)
US 9345717 — method of use (U-4332)
Exclusivity NP
Exclusivity GAIN
2025 2027 2029 2031 2033 2035 2037 2039
Today
LOE
Substance patent Formulation patent Method-of-use patent Exclusivity Pediatric +6mo
🏛️FDA exclusivity
FDA-granted marketing protection. It’s separate from patents and may be shorter than patent protection.
🧪Product / substance patents
Patents covering the active ingredient, product, formulation, or related drug features.
🎯Method-of-use patents
Patents covering specific approved uses. These can sometimes be carved out with a “skinny label,” but not always.
🛈 What do these terms mean?
Patent
Legal protection listed in the Orange Book that may delay generic approval or launch. Issued by the U.S. Patent & Trademark Office.
Substance patent
Covers the active drug molecule itself — the hardest to design around. A generic generally can’t launch until it expires.
Formulation (product) patent
Covers a specific formulation or dosage form. A generic can sometimes work around it with a different formulation.
Method-of-use patent
A patent covering one specific approved use of the drug — not necessarily the whole molecule. A generic can sometimes launch with a “skinny label” that carves out the protected use and keeps the others.
Skinny label
A generic label that omits a still-patented use when the FDA allows it — letting a generic reach the market for the unprotected uses.
Exclusivity
FDA-granted marketing protection, separate from patents — e.g. 5-yr new chemical entity, 7-yr orphan drug, or a +6-month pediatric extension.
Paragraph IV
A generic applicant’s formal challenge to a listed patent. It can potentially lead to earlier generic entry, but often involves litigation or a settlement.
RLD / RS
Reference Listed Drug — the brand product the FDA uses as the reference for generic applications. Reference Standard — the product the FDA expects generics to compare against in bioequivalence testing.
TE / AB rating
FDA therapeutic-equivalence rating. An AB rating generally means the FDA considers a generic therapeutically equivalent to — and substitutable for — the brand.
LOE (loss of exclusivity)
The latest patent or exclusivity currently listed — the loss-of-exclusivity / latest-listed-protection date shown on this page. Paragraph-IV challenges and settlements can move the real date earlier; FDA approval and a manufacturer’s decision to market can move it later.

Built from the FDA Orange Book. The bars above are scaled to each protection’s expiry; the red LOE marker is the last one to lapse.

Listed patents (3)
PatentTypeUse codeExpires
US 11541064 ↗ Method of use U-4331 Jan 30, 2039
US 10086006 ↗ Method of use U-4332 Oct 12, 2034
US 9345717 ↗ Method of use U-4332 Oct 27, 2034
FDA exclusivity
CodeWhat it grantsExpires
NPNew ProductOct 22, 2028
GAINQualified Infectious Disease Product (+5-year)Oct 22, 2033
Common questions
Is there a generic version of CONTEPO 6 GRAM VIAL?
No FDA-approved generic equivalent is currently listed in the FDA Orange Book for CONTEPO 6 GRAM VIAL. Based on the patents and exclusivity currently listed, the Orange Book estimate is that full-label generic entry may be delayed until Jan 2039 — an estimate, not a guaranteed launch date.
The FDA approved a generic — why can’t I get it at my pharmacy yet?
FDA approval and pharmacy availability are two different things. The FDA can approve a generic years before it actually reaches pharmacies, because the brand company may still hold patents or have a settlement that delays the launch. A manufacturer also has to choose to make and sell it, and have supply ready. So a drug can be “FDA-approved generic exists” and still be brand-only at the counter today.
Why do different websites show different generic release dates?
Generic availability is not based on one single date. Some sources use the first exclusivity expiration, some use the last product patent, and others use the latest method-of-use patent. Patent challenges, settlements, licenses, and label carve-outs can also change the real-world launch date. This page shows the underlying Orange Book dates so you can see why estimates may differ.
What does “FDA listed” mean?
It means the product appears in the FDA’s official NDC directory. That’s a good sign a product exists and is intended for the U.S. market, but on its own it does not confirm a pharmacy can fill it today. Where we have recent retail pricing data (NADAC) for a product, we label it “Availability likely” instead.
What does a patent or protection date mean here?
It’s the latest date currently listed in the FDA Orange Book for a patent or exclusivity on the brand product. It can affect when a full generic version becomes widely available — but it is not a guaranteed generic launch date. Generics sometimes arrive earlier (through a settlement or patent challenge) or later (a manufacturer still has to make and sell one).
What does “current Orange Book estimate” mean?
It means we are using the latest patent and exclusivity dates currently listed in the FDA Orange Book. It is not a guaranteed launch date.
Can a generic come out before the last patent expires?
Sometimes. A generic company may challenge a patent, settle with the brand manufacturer, receive a license, or obtain approval with a narrower label that avoids a patented use. In other cases, the last listed protection may delay full-label generic competition.
Can a generic come out after the listed dates?
Yes. Even after patents or exclusivity expire, a generic still needs FDA approval and a manufacturer must choose to market it. Supply, litigation, business decisions, or regulatory issues can delay actual availability.
What is the difference between patents and exclusivity?
Patents are legal protections usually issued by the U.S. Patent and Trademark Office. FDA exclusivity is marketing protection granted by the FDA. They are separate, and either one can affect generic timing.
Why are there multiple patent dates?
One drug can have several patents covering different things: the active ingredient, a formulation, a manufacturing process, or a specific approved use. That is why a page may show several expiration dates instead of one simple generic date.
Built from FDA Orange Book patent and exclusivity data. Dates are refreshed from public FDA data when available; the marker is max(latest patent expiry, latest exclusivity expiry). Paragraph-IV settlements and first-filer 180-day exclusivity can shift the real date; a method-of-use patent may allow an earlier skinny-label generic for non-protected indications. Generic launch timing is an estimate, not a guarantee.
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.

📦 Packaging — all sizes for this product

Package NDCDescription Marketing startStatus
71288-0035-52 You're viewing this 12 VIAL, GLASS in 1 CARTON (71288-035-52) / 1 INJECTION, POWDER, FOR SOLUTION in 1 VIAL, GLASS (71288-035-51) 2025-10-22 Active

🧭 About this NDC listing & data coverage

Finished prescription product
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 — Not published for this NDC No photo available yet for this listing.
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.
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 71288-035-52, 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: 71288-0035-52, written without dashes as 71288003552. 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 71288-0035-52, the first segment (71288) is the labeler code FDA assigned to Meitheal Pharmaceuticals Inc.; the middle segment (0035) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (52) identifies this exact package size and type. Together they name one specific package of one specific product.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by Meitheal Pharmaceuticals Inc.. Listing status can change — the directory data on this page refreshes weekly.
Who lists this product with the FDA?
Meitheal 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 💊 Dosage Forms and Strengths ⛔ Contraindications ⚠️ Warnings and Cautions 🤒 Adverse Reactions 🔄 Drug Interactions 👥 Use in Specific Populations 🤰 Pregnancy 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📋 Description 💬 Information for Patients
🎯 Indications and Usage 212 words ▾

1 INDICATIONS AND USAGE CONTEPO is an epoxide antibacterial indicated for the treatment of patients 18 years of age and older with complicated urinary tract infections (cUTI) including acute pyelonephritis caused by susceptible isolates of Escherichia coli and Klebsiella pneumoniae . ( 1.1 ) Usage to Reduce Development of Drug-Resistant Bacteria To reduce the development of drug-resistant bacteria and maintain the effectiveness of CONTEPO and other antibacterial drugs, CONTEPO should be used only to treat infections that are proven or strongly suspected to be caused by bacteria.

( 1.2 )

1.1Complicated Urinary Tract Infections (cUTI), including Acute Pyelonephritis CONTEPO is indicated for the treatment of patients 18 years and older with complicated urinary tract infections (cUTI), including acute pyelonephritis, caused by susceptible isolates of Escherichia coli and Klebsiella pneumoniae .

1.2Usage to Reduce Development of Drug-Resistant Bacteria To reduce the development of drug-resistant bacteria and maintain the effectiveness of CONTEPO and other antibacterial drugs, CONTEPO should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

⏱️ Dosage and Administration ~3 min read ▾

2 DOSAGE AND ADMINISTRATION Administer CONTEPO, 6 grams every 8 hours by intravenous (IV) infusion over 1 hour for up to 14 days, in patients 18 years of age or older with an estimated creatinine clearance (CLcr) greater than 50 mL/min. ( 2.1 ) The recommended dosage in patients 18 years of age and older with an estimated CLcr of 50 mL/min or less is presented in the table below. ( 2.2 ) a CLcr estimated using Cockcroft-Gault Equation. b All doses of CONTEPO are administered by intravenous infusion over 1 hour.

Estimated CLcr (mL/min) a Loading Dose b Maintenance Dosage b Dose Frequency 41-50 6 grams 4 grams Every 8 hours 31-40 6 grams 3 grams Every 8 hours 21-30 6 grams 5 grams Every 24 hours 11-20 6 grams 3 grams Every 24 hours Approximately 60% to 80% of the fosfomycin dose is cleared from the body by hemodialysis. Administer CONTEPO after hemodialysis on hemodialysis days. ( 2.2 )

2.1Recommended Dosage The recommended dosage of CONTEPO is 6 grams administered every 8 hours by intravenous (IV) infusion over 1 hour in patients 18 years of age or older with an estimated creatinine clearance (CLcr) greater than 50 mL/min. The duration of therapy is up to 14 days and should be guided by the severity of infection and the patient's clinical status. During treatment, different dosage recommendations may be required based on change in estimated CLcr [ see Dosage and Administration ( 2.2 ) ] .

2.2Recommended Dosage in Patients (18 Years of Age and Older) with Renal Impairment The recommended dosage of CONTEPO in patients 18 years of age and older with an estimated CLcr of 50 mL/min or less is presented in Table 1 . Monitor estimated CLcr and adjust the dosage of CONTEPO accordingly [ see Warnings and Precautions ( 5.1 ), Use in Specific Populations ( 8.6 ) and Clinical Pharmacology ( 12.3 ) ] . Table 1 Dosage of CONTEPO in Patients (18 Years of Age and Older) with Renal Impairment a CLcr estimated by Cockcroft-Gault Equation. b All doses of CONTEPO are administered by IV infusion over 1 hour.

Estimated CLcr (mL/min) a Loading Dose b Maintenance Dosage b Dose Frequency 41-50 6 grams 4 grams Every 8 hours 31-40 6 grams 3 grams Every 8 hours 21-30 6 grams 5 grams Every 24 hours 11-20 6 grams 3 grams Every 24 hours Approximately 60 to 80 % of the fosfomycin dose is cleared from the body by hemodialysis. Administer CONTEPO after hemodialysis on hemodialysis days.

2.3Preparation of Diluted Solutions of CONTEPO Preparation CONTEPO is supplied as a dry powder in a single-dose vial that must be constituted and further diluted prior to intravenous infusion as described below. CONTEPO does not contain preservatives. Aseptic technique must be used for constitution and dilution prior to IV infusion.

Constitute the vial with 30 mL of Sterile Water for Injection, USP and gently mix to completely dissolve contents. A slight degree of warming occurs when the powder is dissolved. The constituted solution should appear clear and colorless.

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. The constituted solution is not for direct injection and must be further diluted immediately with Sterile Water for Injection, USP [see Dosage and Administration ( 2.4 )] before intravenous infusion. To prepare the infusion solution, first remove 80 mL from a 250 mL intravenous bag of Sterile Water for Injection, USP for infusion so that it contains approximately 170 mL.

Then add the required volume of constituted solution to the infusion bag according to Table 2 . Discard unused portion. The constituted and further diluted solution of CONTEPO has a pH of 7.4 to 7.8.

Table 2 Preparation of CONTEPO Doses CONTEPO Dose Volume to Withdraw from Constituted Vial Volume of Final Infusion Bag (Approximate) Final Infusion Concentration of CONTEPO (Approximate) 6 grams 32.6 mL (Entire Contents) 202 mL 30 mg/mL 5 grams 27 mL 197 mL 25 mg/mL 4 grams 21.5 mL 192 mL 20…

💊 Dosage Forms and Strengths 55 words ▾

3 DOSAGE FORMS AND STRENGTHS CONTEPO for Injection contains 6 grams of fosfomycin, and is supplied as a white or almost white, sterile powder in single-dose vials, for constitution and further dilution. CONTEPO for Injection contains 6 grams of fosfomycin as a sterile powder in single-dose vials for reconstitution and further dilution. ( 3 )

⛔ Contraindications 47 words ▾

4 CONTRAINDICATIONS CONTEPO is contraindicated in patients with known serious hypersensitivity to fosfomycin, or any of the excipients [ see Warnings and Precautions ( 5.2 ) ] . CONTEPO is contraindicated in patients with known serious hypersensitivity to fosfomycin, or any of the excipients. ( 4 )

⚠️ Warnings and Cautions ~3 min read ▾

5 WARNINGS AND PRECAUTIONS Serum Electrolyte Abnormalities : CONTEPO contains 1980 mg sodium in each vial. The high sodium load associated with the use of CONTEPO may result in changes in serum electrolytes, such as increased levels of sodium and decreased levels of potassium, calcium and phosphorus. A low-sodium diet is recommended during CONTEPO treatment.

Monitor serum electrolyte levels and fluid status during CONTEPO treatment. Monitor signs and symptoms of edema, particularly in patients with cardiac insufficiency, renal impairment, cirrhosis, hypertension, hyperaldosteronism, hypernatremia or pulmonary edema. ( 5.1 ) QT Prolongation: CONTEPO has been shown to prolong the QT interval in some patients in the clinical trial.

Avoid CONTEPO in patients with known prolongation of the QT interval or ventricular arrhythmias, including a history of torsade de pointes. ( 5.2 , 7.1 ) Increased Transaminase Levels : Increase in alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were reported in the clinical trial. Monitor hepatic enzymes during CONTEPO treatment.

( 5.3 ) Hypersensitivity Reactions : Reactions such as rash, urticaria and anaphylaxis were reported with the use of CONTEPO. Before initiating therapy with CONTEPO, it is important to inquire about previous hypersensitivity reactions to oral or parenteral fosfomycin. If an allergic reaction occurs, discontinue CONTEPO immediately.

( 5.4 ) Neutropenia Including Agranulocytosis : Neutropenia, including agranulocytosis, has occurred in patients receiving IV fosfomycin treatment. Monitor complete blood count during CONTEPO therapy. If such reactions occur, discontinue CONTEPO and institute appropriate treatment ( 5.5 ).

Clostridioides difficile -Associated Diarrhea (CDAD) : This has been reported with nearly all systemic antibacterial agents, including CONTEPO. Evaluate patients if diarrhea occurs. ( 5.6 )

5.1Serum Electrolyte Abnormalities CONTEPO contains 1,980 mg of sodium in each vial. The high sodium load associated with the use of CONTEPO may result in changes in serum electrolytes, such as increased levels of serum sodium and decreased levels of potassium, calcium, and phosphorous. Electrolyte disturbances, such as hypokalemia and hypocalcemia, may potentiate cardiac effects, including QT prolongation [ see Warnings and Precautions ( 5.2 ) and Clinical Pharmacology ( 12.2 ) ] .

In Trial 1, a comparator-controlled clinical trial in patients with cUTI, hypokalemia, hypernatremia, hypophosphatemia, and hypocalcemia occurred more frequently in CONTEPO-treated patients compared with piperacillin/tazobactam-treated patients [ see Adverse Reactions ( 6.1 ) ] . Hypokalemia with serum potassium less than 3.0 mEq/L and/or requiring potassium supplementation occurred in 9.9% of patients receiving CONTEPO and 1.7% of patients receiving piperacillin/tazobactam. Hypophosphatemia with serum phosphate concentrations less than 1.0 mg/dL occurred in 2.1% of patients receiving CONTEPO and none of the patients receiving piperacillin/tazobactam.

Hypernatremia with serum sodium greater than 150 mEq/L occurred in 3.4% of patients receiving CONTEPO and 0.9% of patients receiving piperacillin/tazobactam. Hypocalcemia with corrected serum calcium less than 8.0 mg/dL occurred in 3.9% of patients receiving CONTEPO and 2.6% of patients receiving piperacillin/tazobactam. A low-sodium diet is recommended during CONTEPO treatment.

Minimize administration of drugs containing sodium. Monitor serum electrolyte levels (sodium, potassium, calcium, magnesium, and phosphorus) and fluid status during treatment with CONTEPO. Electrolyte supplementation may be necessary in some cases.

Monitor for signs of edema, particularly in patients who should restrict their sodium intake or are prone to fluid overload (e.g., cardiac insufficiency, renal impairment, cirrhosis, hypertension, hyperaldosteronism, hypernatremia or pulmonary edema) [ see Adverse Reactions ( 6.1 ) ] .

5.2 QT Prolongation CONTEP…

🤒 Adverse Reactions ~2 min read ▾

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in the Warnings and Precautions section: Serum Electrolyte Abnormalities [see Warnings and Precautions ( 5.1 )] QT Prolongation [see Warnings and Precautions ( 5.2 )] Increased Transaminase Levels [see Warnings and Precautions ( 5.3 )] Hypersensitivity Reactions [see Warnings and Precautions ( 5.4 )] Neutropenia Including Agranulocytosis [see Warnings and Precautions ( 5.5 )] Clostridioides difficile -Associated Diarrhea [see Warnings and Precautions ( 5.6 )] Development of Drug-Resistant Bacteria [see Warnings and Precautions ( 5.7 )] Most common adverse reactions (incidence ≥2%) are transaminase elevations, hypokalemia, neutropenia, nausea, vomiting, diarrhea, hypocalcemia, hypernatremia, headache, and hypophosphatemia.

( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Meitheal Pharmaceuticals Inc. at 1-844-824-8426 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. CONTEPO was evaluated in a comparator-controlled clinical trial (Trial 1) in patients with cUTI, including acute pyelonephritis, which included 233 patients treated with CONTEPO and 231 treated with comparator (piperacillin/tazobactam 4.5 g every 8 hours) for 7 days, allowing bacteremic patients to receive up to 14 days.

No switch to oral antibacterial drugs was allowed. The median age of treated patients was 54 years (range 18-89 years) and 64% were female. All patients were white (100%).

Patients (99%) were predominantly enrolled in Eastern Europe. Concomitant bacteremia was identified in 9% of patients at baseline. Serious Adverse Reactions and Adverse Reactions Leading to Discontinuation Serious adverse reactions occurred in 2.1% (5/233) CONTEPO and 2.6% (6/231) piperacillin/tazobactam-treated patients, respectively.

Treatment was discontinued due to adverse reactions in 3% (7/233) of patients receiving CONTEPO and in 2.6% (7/231) of patients receiving piperacillin/tazobactam. The most common adverse reactions resulting in discontinuation of CONTEPO were gastrointestinal disorders (nausea, vomiting, and abdominal pain) in 1.3% (3/233) of patients. No deaths occurred in the clinical trial.

Common Adverse Reactions Table 3 lists adverse reactions occurring in 2% or greater of patients receiving CONTEPO in Trial 1. These adverse reactions were reversible upon completion of therapy. Table 3 Adverse Reactions Occurring in 2% or Greater of Patients with cUTI Receiving CONTEPO in Trial 1 a Transaminase elevations include increased ALT and AST ≥3x ULN. b Neutropenia includes absolute neutrophil count <1500 cells/mm 3 Adverse Reaction CONTEPO N=233 % Piperacillin/Tazobactam N=231 % Gastrointestinal Disorders Nausea 4.3

1.3Diarrhea 3.9

4.8Vomiting 3.9

0.4Laboratory Investigations Transaminase elevations a 10.3

4.8Hypokalemia 9.9

1.7Hypophosphatemia 2.1

0.0Hypocalcemia 3.9

2.6Hypernatremia 3.4

0.9Blood and Lymphatic System Disorders Neutropenia b 6.4

3.9Nervous System Disorders Headache 2.6

2.2Adverse Reactions Occurring in < 2% of Patients Receiving CONTEPO in Trial 1: Blood and lymphatic system disorders : anemia, thrombocytopenia Cardiac disorders : atrial fibrillation, palpitations, tachycardia, heart failure Ear and labyrinth disorders : hearing loss Gastrointestinal disorders : constipation General disorders and administration site conditions : asthenia, infusion site reactions, peripheral edema Hepatobiliary disorders : hepatic steatosis, hepatomegaly Infections and infestations : vaginal infection, vaginitis Investigations : increase creatinine kinase Metabolism and nutritional disorders : hyperglycemia Nervous system disorders : dysgeusia, syncope Respiratory, thoracic, and m…

🔄 Drug Interactions 79 words ▾

7 DRUG INTERACTIONS Avoid co-administration of CONTEPO with drugs known to prolong the QT interval. ( 5.2 , 7.1 )

7.1Drugs that prolong QT interval Co-administration of CONTEPO with other drugs known to prolong the QT interval may increase the risk for ventricular arrhythmia. Avoid co-administration of CONTEPO with drugs known to prolong the QT interval, such as class IA or class III antiarrhythmic medications, tricyclic antidepressants, macrolides, and antipsychotics [see Warnings and Precautions ( 5.2 )] .

👥 Use in Specific Populations ~3 min read ▾

8 USE IN SPECIFIC POPULATIONS Lactation: Breastfeeding not recommended during treatment and 24 hours after the last dose (8.2).

8.1Pregnancy Risk Summary Available data from observational studies and pharmacovigilance reports with fosfomycin use in pregnant women are insufficient to identify a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. Fosfomycin crosses the placental barrier. There are no animal data that meet current standards for nonclinical developmental toxicity studies.

However, some reproductive toxicity data are available from published literature. Intravenous or intraperitoneal fosfomycin-sodium did not cause malformations in rabbits or rats, respectively, but showed evidence of fetotoxicity (see Data ). The clinical relevance of these animal data is uncertain.

The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defect and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

Data Animal Data Fosfomycin crosses the placenta in rats and rabbits. In rats administered intraperitoneal fosfomycin sodium on Days 7 to 17 of gestation (during organogenesis), there were increased numbers of dead or resorbed fetuses at 1500 mg/kg (approximately 0.8 times the recommended human dose of 18 g/day, based on body surface area comparisons), a dose associated with maternal toxicity . Rabbits were administered intravenous fosfomycin sodium on Days 6 to 18 of gestation (during organogenesis) at doses 800 mg/kg (approximately 0.9 times the recommended human dose).

No malformations were observed in rabbits or rats after intravenous or intraperitoneal fosfomycin sodium, respectively. In a pre- and post-natal developmental study in rats (dosed intraperitoneally with fosfomycin tromethamine between gestational day 6 and postnatal Day 21), no effects were observed in first-generation offspring at doses up to 1000 mg/kg, about 0.5 times the clinical dose, based on body surface area comparisons. Survival and postnatal body growth also were normal in the second-generation offspring at all doses.

8.2Lactation Risk Summary Fosfomycin is present in human milk. There are no data on the effects of fosfomycin on the breastfed child or on milk production. Because of the potential for adverse reactions in a breastfed infant, advise patients not to breastfeed during treatment with CONTEPO and for 24 hours after the last dose.

8.4Pediatric Use Safety and effectiveness of CONTEPO in patients less than 18 years of age has not been established.

8.5Geriatric Use Of the 233 patients treated with CONTEPO in Trial 1, 32% (74/233) were 65 years of age and older, including 11.2% (26/233) who were 75 years of age and older. For patients included in the microbiological modified intent-to-treat (mMITT) population, lower overall success rates were observed for CONTEPO-treated and piperacillin/tazobactam-treated patients ≥ 65 years of age (53.6% and 43.9%, respectively) as compared to patients < 65 years (68.4% and 61.6%, respectively). For patients ≥ 65 years of age, the incidence rate of adverse reactions was 39.2% (29/74) in CONTEPO-treated patients and 28.6% (22/77) in the piperacillin/tazobactam-treated patients.

For patients <65 years of age, the incidence rate of adverse reactions was 43.4% (69/159) in CONTEPO-treated patients and 33.8% (52/154) in the piperacillin/tazobactam-treated patients. Because elderly patients are more likely to have decreased cardiac and renal function, care should be taken in dose selection, and electrolytes, fluid status, and renal function should be monitored. Dosage adjustment in elderly patients should take into account renal function [ see Dosage and Administration ( 2.2 , 2.3 , 2.4 ) and Clinical Pharmacology ( 12.3 ) ] .

8.6 Re…

🤰 Pregnancy ~1 min read ▾

8.1Pregnancy Risk Summary Available data from observational studies and pharmacovigilance reports with fosfomycin use in pregnant women are insufficient to identify a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. Fosfomycin crosses the placental barrier. There are no animal data that meet current standards for nonclinical developmental toxicity studies.

However, some reproductive toxicity data are available from published literature. Intravenous or intraperitoneal fosfomycin-sodium did not cause malformations in rabbits or rats, respectively, but showed evidence of fetotoxicity (see Data ). The clinical relevance of these animal data is uncertain.

The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defect and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

Data Animal Data Fosfomycin crosses the placenta in rats and rabbits. In rats administered intraperitoneal fosfomycin sodium on Days 7 to 17 of gestation (during organogenesis), there were increased numbers of dead or resorbed fetuses at 1500 mg/kg (approximately 0.8 times the recommended human dose of 18 g/day, based on body surface area comparisons), a dose associated with maternal toxicity . Rabbits were administered intravenous fosfomycin sodium on Days 6 to 18 of gestation (during organogenesis) at doses 800 mg/kg (approximately 0.9 times the recommended human dose).

No malformations were observed in rabbits or rats after intravenous or intraperitoneal fosfomycin sodium, respectively. In a pre- and post-natal developmental study in rats (dosed intraperitoneally with fosfomycin tromethamine between gestational day 6 and postnatal Day 21), no effects were observed in first-generation offspring at doses up to 1000 mg/kg, about 0.5 times the clinical dose, based on body surface area comparisons. Survival and postnatal body growth also were normal in the second-generation offspring at all doses.

🧒 Pediatric Use 20 words ▾

8.4Pediatric Use Safety and effectiveness of CONTEPO in patients less than 18 years of age has not been established.

🧓 Geriatric Use 186 words ▾

8.5Geriatric Use Of the 233 patients treated with CONTEPO in Trial 1, 32% (74/233) were 65 years of age and older, including 11.2% (26/233) who were 75 years of age and older. For patients included in the microbiological modified intent-to-treat (mMITT) population, lower overall success rates were observed for CONTEPO-treated and piperacillin/tazobactam-treated patients ≥ 65 years of age (53.6% and 43.9%, respectively) as compared to patients < 65 years (68.4% and 61.6%, respectively). For patients ≥ 65 years of age, the incidence rate of adverse reactions was 39.2% (29/74) in CONTEPO-treated patients and 28.6% (22/77) in the piperacillin/tazobactam-treated patients.

For patients <65 years of age, the incidence rate of adverse reactions was 43.4% (69/159) in CONTEPO-treated patients and 33.8% (52/154) in the piperacillin/tazobactam-treated patients. Because elderly patients are more likely to have decreased cardiac and renal function, care should be taken in dose selection, and electrolytes, fluid status, and renal function should be monitored. Dosage adjustment in elderly patients should take into account renal function [ see Dosage and Administration ( 2.2 , 2.3 , 2.4 ) and Clinical Pharmacology ( 12.3 ) ] .

🆘 Overdosage 57 words ▾

10 OVERDOSAGE To date, no cases of accidental overdose with clinically relevant intolerances have been reported. In the event of an overdose, the patient must be monitored and treated symptomatically. Fosfomycin is cleared from the body by hemodialysis, during which patients with end stage renal disease have an increased mean fosfomycin elimination half-life to approximately 4 hours.

🧬 Clinical Pharmacology ~3 min read ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action CONTEPO is an antibacterial drug [ see Microbiology ( 12.4 ) ] .

12.2Pharmacodynamics The ratio of the unbound plasma fosfomycin AUC to MIC against the infecting organism has been shown to correlate with activity in animal models of infection. Cardiac Electrophysiology The effect of CONTEPO on 12-lead electrocardiogram parameters was evaluated in a Phase 1 randomized, placebo and positive controlled, double-blind, single-dose crossover study in 36 healthy adult subjects. At single doses of 6 grams and 12 grams (2 times the maximum single recommended dosage), CONTEPO demonstrated a dose dependent increase in QTcF.

Mean placebo-corrected QTcF change from baseline was 8.3 msec (90% CI: 5.39 to 11.30) and 17.0 msec (90% CI: 14.06 to 20.01) for single doses of 6 grams and 12 grams, respectively, compared to 13.4 msec (90% CI: 10.48 to 16.39) observed with the active control, oral moxifloxacin. There were no subjects receiving CONTEPO with QTcF change from baseline greater than 60 msec or a QTcF greater than 480 msec [see Warnings and Precautions ( 5.2 )] . A 1-hour CONTEPO infusion of the studied doses did not have a clinically meaningful effect on heart rate or on cardiac conduction, i.e., the PR and QRS interval.

12.3Pharmacokinetics The mean pharmacokinetic parameters of fosfomycin in healthy adults with normal renal function after single doses of 6 grams administered as 1-hour IV infusion are summarized along with additional pharmacokinetic information in Table 4 . Table 4 Exposure Parameter Estimates (Mean ± SD) a Following Single Dose of 6 grams Fosfomycin Administered as 1-hour IV Infusion in Healthy Adults with Normal Renal Function a Based on non-compartmental analysis of PK data C max (mcg/mL) 228 ± 43 AUC 0-inf (mcg∙hr/mL) 734 ± 134 Dose Proportionality Fosfomycin C max and AUC 0-inf increase proportionally with dose Distribution Volume of Distribution (L) 27 ±

5.2Protein Binding Fosfomycin is not bound to plasma proteins Elimination Half-Life (h) 2.8 ±

0.6Total Clearance (L/h) 8.5 ±

1.7Metabolism Fosfomycin is not metabolized. Excretion Urine: 70% of dose is excreted unchanged at 12 hours; 74-80% of dose is excreted unchanged at 48 hours Specific Populations No clinically significant differences in the pharmacokinetics of fosfomycin based on sex, body weight/body surface area, race/ethnicity or age (18 to 89 years of age, when adjusted for renal function) were identified. Patients with Renal Impairment Dosage adjustment is required for patients whose creatinine clearance is 50 mL/min or less [ see Dosage and Administration ( 2.2 ), Use in Specific Populations ( 8.6 ) ] .

When fosfomycin is administered prior to hemodialysis in patients on periodic or chronic hemodialysis, 61-79% of the fosfomycin dose is removed. Patients with Hepatic Impairment CONTEPO is not metabolized through the liver. The effect of hepatic impairment on the pharmacokinetics of CONTEPO is unknown.

Monitoring fluid overload and electrolyte abnormalities is recommended for patients with severe hepatic impairment [see Warnings and Precautions ( 5.1 ), Use in Specific Populations ( 8.7 )] . Drug Interaction Studies In Vitro Studies Fosfomycin at clinically relevant concentrations does not inhibit CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP3A4/5. Fosfomycin does not induce CYP1A2, CYP2B6, and CYP3A4.

Fosfomycin is not a substrate for P-gp, BCRP, OATP1B1, OATP1B3, OAT1, OAT3, OCT2, MATE1 or MATE2-K. Fosfomycin inhibits MATE1 and MATE2-K with the observed IC50 values of 30.0 mM (4142 mcg/mL) and 56.4 mM (7787 mcg/mL), respectively. Fosfomycin does not inhibit P-gp, BCRP, OATP1B1, OATP1B3, OAT1, OAT3, OCT1, and OCT2.

12.4Microbiology Mechanism of Action Fosfomycin is an epoxide antibacterial drug that disrupts bacterial cell wall synthesis by covalently binding and inhibiting phosphoenolpyruvate transferase (MurA), thereby blocking the synthesis of peptidoglycan. Fosfomycin is bactericida…

🧬 Mechanism of Action 17 words ▾

12.1Mechanism of Action CONTEPO is an antibacterial drug [ see Microbiology ( 12.4 ) ] .

📦 How Supplied / Storage and Handling 123 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING How Supplied CONTEPO for injection is supplied as a white to almost white sterile powder containing 6 grams of fosfomycin in a single-dose vial. Each gram of fosfomycin disodium contains 330 mg of sodium (i.e., each vial contains 1,980 mg of sodium). CONTEPO is supplied in a clear Type I glass single-dose vial (NDC 71288-035-51) with a rubber closure and a twist-off cap.

Twelve ( 12 ) vials are supplied in each carton (NDC 71288-035-52). Storage and Handling Store CONTEPO vials at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [See USP Controlled Room Temperature]. Store CONTEPO in the carton until time of use [see Dosage and Administration ( 2.4 )].

📋 Description 121 words ▾

11 DESCRIPTION CONTEPO (fosfomycin) for injection, for intravenous use, contains fosfomycin disodium, an epoxide antibacterial drug. Fosfomycin disodium is a powder with the chemical name of disodium [(2R,3S)-3-methyloxiran-2-yl]-dioxido-oxophosphorane, an empirical formula of C 3 H 5 Na 2 O 4 P and molecular weight of 182. Figure 1 Chemical Structure of Fosfomycin Disodium Each CONTEPO for Injection single-dose vial contains white to almost white sterile powder with 6 grams of fosfomycin (equivalent to 7.9 grams fosfomycin disodium) and the inactive ingredient succinic acid (150 mg) for pH adjustment.

It is intended for constitution and further dilution prior to intravenous infusion . Each gram of fosfomycin disodium contains 330 mg of sodium (i.e., each vial contains 1,980 mg of sodium). Figure 1

💬 Information for Patients ~2 min read ▾

17 PATIENT COUNSELING INFORMATION Electrolyte Abnormalities Advise patients that a low sodium diet is recommended during CONTEPO treatment because the high sodium load (each vial of CONTEPO contains 1,980 mg sodium) may cause changes in electrolytes or increased edema [ see Warnings and Precautions ( 5.1 ) ] . Blood tests to monitor electrolytes will be required. If peripheral edema develops, tell the patient to contact their health care provider.

Serious Allergic Reactions Advise patients that allergic reactions, including serious allergic reactions, could occur and that serious reactions require immediate treatment. Ask patient about any previous hypersensitivity reactions to CONTEPO, fosfomycin or other allergens [see Warnings and Precautions ( 5.2 )] . Potentially Serious Diarrhea Advise patients that diarrhea is a common problem caused by antibacterial drugs, including CONTEPO.

Sometimes, frequent watery or bloody diarrhea may occur and may be a sign of a more serious intestinal infection. If severe watery or bloody diarrhea develops, tell patient to contact his or her healthcare provider [ see Warnings and Precautions ( 5.6 ) ] . Antibacterial Resistance Patients should be counseled that antibacterial drugs including CONTEPO should only be used to treat bacterial infections.

They do not treat viral infections (e.g. the common cold). When CONTEPO is prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by CONTEPO or other antibacterial drugs in the future [see Warnings and Precautions ( 5.7 )] .

Lactation Advise females not to breastfeed during treatment with CONTEPO and for 24 hours after the final dose [see Use in Specific Populations ( 8.2 )] . Manufactured for Meitheal Pharmaceuticals Chicago, IL 60631 (USA) Made in Italy ©2025 Meitheal Pharmaceuticals Inc. CONTEPO is a trademark of Meitheal Pharmaceuticals, Inc.

All rights reserved 3510868-02

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