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INOMAX nitric oxide .98 mg/L Gas — NDC 64693-0002-01 package photo

INOMAX nitric oxide .98 mg/L Gas

by INO Therapeutics LLC · 1 CYLINDER in 1 CARTON (64693-002-01) / 353 L in 1 CYLINDER
NDC 64693-0002-01
🏷️ FDA NDC (as labeled) 64693-002-01 billing pads the product segment with a zero
This package
Contains353 l in 1 cylinder Pack sizes2 compare ↓
Also comes in: 1963 L 64693-0002-02
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) 64693-002-01
Product NDC 64693-002
11-digit billing NDC 64693000201
NCPDP billing unit EA — each (per item)
RxCUI 582608, 827693
UNII 31C4KY9ESH
Application # NDA020845
SPL Set ID 762b51be-1893-4cd1-9511-e645fc420d3a
Established class (EPC) Vasodilator
Physiologic effect Vasodilation
DEA schedule Non-controlled
Marketing category NDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 1999-12-23
Route RESPIRATORY (INHALATION)
Dosage form GAS
Substance NITRIC OXIDE
GCN Seq No 062471
GCN 98247
HICL code 034614
Ingredient (HICL) Nitric Oxide
HIC1 code B
Therapeutic class — broad (HIC1) Respiratory System
HIC2 code B1
Therapeutic class — intermediate (HIC2) Affect Primarily Lungs
HIC3 code B1E
Therapeutic class — specific (HIC3) Pulmonary Antihypertensives, Cgmp Pathway, Gases
AHFS code 24:08.08.00
AHFS class Nitrates And Nitrites
FDB label name INOMAX 800PPM GAS
FDB brand name Inomax
Legend status F — Federal legend — prescription drug or device
Why two NDCs? The FDA registers this code as 64693-002-01 — 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 → 64693-0002-01. 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 Vasodilator class.

Pharmacologic class Vasodilator
Drug family (ATC) Other respiratory system products
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

LabelerINO Therapeutics LLC
Application holderMALLINCKRODT PHARMACEUTICALS IRELAND LTD
FDA applicationNDA020845 (NDA)
Labeler code64693
First marketedDec 1999
Product typeHuman Prescription Drug
Portfolio2 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 INOMAX 800PPM GAS Ingredient Nitric Oxide

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 N762921K75
    A colorless, odorless gas that makes up most of the air we breathe. In medicines, it's used as a packaging gas or propellant to protect products from oxidation and maintain freshness.

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 eachPer 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: 1963 L
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
Noxivent 102 800 mg/L 59579-0102-01 Linde 2082 l — — FDA listed —
Inomax .98 mg/Lthis 64693-0002-01 INO 1 cylinder — — FDA listed —
Noxivent 800 mg/L 72385-0102-01 VERO 2082 l — — FDA listed —
Ulspira .8 mL/100L 82605-0008-01 Airgas 2138 l — AA FDA listed —
Genosyl .98 mg/L 72385-0001-01 VERO 216 l — — FDA listed —
Genosyl .98 mg/L 72385-0003-01 VERO 73 l — — FDA listed —
Genosyl .98 mg/L 72385-0002-01 VERO 216 l — — FDA listed —
About this product: this is the brand-name version. Some generic versions are approved by the FDA, but we could not confirm current pharmacy availability from our pricing/market data.
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

🏛️
2023
First FDA approval
Jan 2023
📍
2026
Currently FDA-listed
3 years listed
🛡️
2036
Latest patent/protection listed
not a guaranteed launch date
🔒Generic approved by FDA, but pharmacy availability is not confirmed

The FDA lists approved generic versions of this medicine, but that does not always mean a pharmacy can get one today. Patent rules, launch agreements, supply and pricing can affect when generics actually arrive.

🛡️ Latest patent/protection date listed: FDA patent/protection data lists protections through Nov 2036. This may affect when a full generic version becomes widely available, but it is not a guaranteed launch date.
📅 FDA approved Jan 17, 2023 RLD RS ⏳ ~10.1 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 8431163 — method of use (U-1286)
US 8282966 — method of use (U-1286)
US 8293284 — method of use (U-1286)
US 8776795 — method of use (U-1226)
US 8795741 — method of use (U-1286)
US 8846112 — method of use (U-1286)
US 9408993 — method of use (U-1824)
US 9265911 — method of use (U-1824)
US 9295802 — method of use (U-1226)
US 8282966 — method of use (U-1286)
US 8293284 — method of use (U-1286)
US 8291904 — method of use (U-1226)
US 8846112 — method of use (U-1286)
US 8776794 — method of use (U-1226)
US 8776795 — method of use (U-1226)
US 8573210 — method of use (U-1453)
US 8795741 — method of use (U-1286)
US 8291904 — method of use (U-1226)
US 8431163 — method of use (U-1286)
US 9279794 — method of use (U-1823)
US 11931377 — drug substance (U-3903)
US 11931377 — drug substance (U-3903)
US 9770570 — method of use (U-2148)
US 8776794 — method of use (U-1226)
US 8573210 — method of use (U-1453)
US 8573209 — drug product
US 8573209 — drug product
US 8282966*PED — drug product
US 8291904*PED — drug product
US 8293284*PED — drug product
US 8431163*PED — drug product
US 8282966*PED — drug product
US 8291904*PED — drug product
US 8293284*PED — drug product
US 8431163*PED — drug product
US 8776795*PED — drug product
US 8776794*PED — drug product
US 8776795*PED — drug product
US 8776794*PED — drug product
US 8795741*PED — drug product
US 8795741*PED — drug product
US 8573209*PED — drug product
US 8573209*PED — drug product
US 8846112*PED — drug product
US 8846112*PED — drug product
US 8573210*PED — drug product
US 8573210*PED — drug product
US 9295802*PED — drug product
US 9408993*PED — drug product
US 9265911*PED — drug product
US 9279794*PED — drug product
US 9770570*PED — drug product
US 11931377*PED — drug product
2023 2025 2027 2029 2031 2033 2035 2037
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 (53)
PatentTypeUse codeExpires
US 8431163 ↗ Method of use U-1286 Jun 30, 2029
US 8282966 ↗ Method of use U-1286 Jun 30, 2029
US 8293284 ↗ Method of use U-1286 Jun 30, 2029
US 8776795 ↗ Method of use U-1226 Jan 6, 2031
US 8795741 ↗ Method of use U-1286 Jun 30, 2029
US 8846112 ↗ Method of use U-1286 Jun 30, 2029
US 9408993 ↗ Method of use U-1824 Jan 6, 2031
US 9265911 ↗ Method of use U-1824 Jan 6, 2031
US 9295802 ↗ Method of use U-1226 Jan 6, 2031
US 8282966 ↗ Method of use U-1286 Jun 30, 2029
US 8293284 ↗ Method of use U-1286 Jun 30, 2029
US 8291904 ↗ Method of use U-1226 Jan 6, 2031
US 8846112 ↗ Method of use U-1286 Jun 30, 2029
US 8776794 ↗ Method of use U-1226 Jan 6, 2031
US 8776795 ↗ Method of use U-1226 Jan 6, 2031
US 8573210 ↗ Method of use U-1453 Jan 6, 2031
US 8795741 ↗ Method of use U-1286 Jun 30, 2029
US 8291904 ↗ Method of use U-1226 Jan 6, 2031
US 8431163 ↗ Method of use U-1286 Jun 30, 2029
US 9279794 ↗ Method of use U-1823 Feb 19, 2035
US 11931377 ↗ Drug substance U-3903 Jun 30, 2029
US 11931377 ↗ Drug substance U-3903 Jun 30, 2029
US 9770570 ↗ Method of use U-2148 May 3, 2036
US 8776794 ↗ Method of use U-1226 Jan 6, 2031
US 8573210 ↗ Method of use U-1453 Jan 6, 2031
US 8573209 ↗ Drug product — Jan 6, 2031
US 8573209 ↗ Drug product — Jan 6, 2031
US 8282966*PED ↗ Drug product — Dec 30, 2029
US 8291904*PED ↗ Drug product — Jul 6, 2031
US 8293284*PED ↗ Drug product — Dec 30, 2029
US 8431163*PED ↗ Drug product — Dec 30, 2029
US 8282966*PED ↗ Drug product — Dec 30, 2029
US 8291904*PED ↗ Drug product — Jul 6, 2031
US 8293284*PED ↗ Drug product — Dec 30, 2029
US 8431163*PED ↗ Drug product — Dec 30, 2029
US 8776795*PED ↗ Drug product — Jul 6, 2031
US 8776794*PED ↗ Drug product — Jul 6, 2031
US 8776795*PED ↗ Drug product — Jul 6, 2031
US 8776794*PED ↗ Drug product — Jul 6, 2031
US 8795741*PED ↗ Drug product — Dec 30, 2029
US 8795741*PED ↗ Drug product — Dec 30, 2029
US 8573209*PED ↗ Drug product — Jul 6, 2031
US 8573209*PED ↗ Drug product — Jul 6, 2031
US 8846112*PED ↗ Drug product — Dec 30, 2029
US 8846112*PED ↗ Drug product — Dec 30, 2029
US 8573210*PED ↗ Drug product — Jul 6, 2031
US 8573210*PED ↗ Drug product — Jul 6, 2031
US 9295802*PED ↗ Drug product — Jul 6, 2031
US 9408993*PED ↗ Drug product — Jul 6, 2031
US 9265911*PED ↗ Drug product — Jul 6, 2031
US 9279794*PED ↗ Drug product — Aug 19, 2035
US 9770570*PED ↗ Drug product — Nov 3, 2036
US 11931377*PED ↗ Drug product — Dec 30, 2029
Common questions
Is there a generic version of INOMAX 800PPM GAS?
Yes — an FDA-approved generic equivalent is listed in the FDA Orange Book for INOMAX 800PPM GAS. See the alternatives section for substitutable, lower-cost products.
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.

🔬 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 INOMAX (this brand).

Top reported reactions

Death362
Oxygen Saturation Decreased189
Condition Aggravated185
Pulmonary Hypertension148
Hypotension137
Respiratory Failure137
Hypoxia128

Age at onset

Neonate299
Infant203
Child48
Adolescent27
Adult336
Elderly145

Reporter sex

0 reports

Serious outcomes

Hospitalization707
Life-threatening518
Reports over time (by year) — tap or hover for the count & year
2021 2022 2024 2026 357 0
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 NDCDescription Marketing startStatus
64693-0002-01 You're viewing this 1 CYLINDER in 1 CARTON (64693-002-01) / 353 L in 1 CYLINDER 1999-12-23 Active
64693-0002-02 1 CYLINDER in 1 CARTON (64693-002-02) / 1963 L in 1 CYLINDER 1999-12-23 Active

Pack size FAQ

What quantity is in NDC 64693-0002-01?
NDC 64693-0002-01 is listed by the FDA — 1 cylinder in 1 carton / 353 l in 1 cylinder.
What NDC number is used to bill for this package of INOMAX nitric oxide .98 mg/L Gas?
Bill NDC 64693-0002-01 — the 11-digit billing format is 64693000201. 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
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.
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 64693-002-01, 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: 64693-0002-01, written without dashes as 64693000201. 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 64693-0002-01, the first segment (64693) is the labeler code FDA assigned to INO Therapeutics LLC; the middle segment (0002) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (01) 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 INO Therapeutics LLC. Listing status can change — the directory data on this page refreshes weekly.
Does this product come in other package sizes?
Yes — the FDA directory lists 1 other package presentation of this same product, including 1 cylinder (64693-0002-02). 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?
INO Therapeutics LLC 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 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📦 Storage and Handling 📋 Description
🎯 Indications and Usage 95 words ▾

1 INDICATIONS AND USAGE INOmax ® is indicated to improve oxygenation and reduce the need for extracorporeal membrane oxygenation in term and near-term (>34 weeks gestation) neonates with hypoxic respiratory failure associated with clinical or echocardiographic evidence of pulmonary hypertension in conjunction with ventilatory support and other appropriate agents. INOmax is a vasodilator indicated to improve oxygenation and reduce the need for extracorporeal membrane oxygenation in term and near-term (>34 weeks gestation) neonates with hypoxic respiratory failure associated with clinical or echocardiographic evidence of pulmonary hypertension in conjunction with ventilatory support and other appropriate agents.

⏱️ Dosage and Administration ~1 min read ▾

2 DOSAGE AND ADMINISTRATION The recommended dose is 20 ppm, maintained for up to 14 days or until the underlying oxygen desaturation has resolved ( 2.1 ). Doses greater than 20 ppm are not recommended ( 2.1 , 5.2 ) Administration: Avoid abrupt discontinuation ( 2.2 , 5.1 ).

2.1Dosage Term and near-term neonates with hypoxic respiratory failure The recommended dose of INOmax is 20 ppm. Maintain treatment up to 14 days or until the underlying oxygen desaturation has resolved and the neonate is ready to be weaned from INOmax therapy. Doses greater than 20 ppm are not recommended [see Warnings and Precautions (5.2) ] .

2.2Administration Nitric Oxide Delivery Systems INOmax must be administered using a calibrated, FDA-cleared Nitric Oxide Delivery System (NODS). There are various FDA-cleared NODS; refer to the NODS labeling to determine which NODS to use with this drug product and for needed information on training and technical support for users of this drug product with the NODS. When utilizing a nitric oxide delivery system specifically cleared for use in the MRI suite (e.g., the INOmax DSIR ® Plus MRI) only use INOmax MR conditional cylinders at 100 gauss or less [see How Supplied/Storage and Handling (16) ].

Keep available a backup battery power supply and an independent reserve nitric oxide delivery system to address power and system failures . Monitoring Measure methemoglobin within 4-8 hours after initiation of treatment with INOmax and periodically throughout treatment [see Warnings and Precautions (5.2) ] . Monitor for PaO 2 and inspired NO 2 during INOmax administration [see Warnings and Precautions (5.3) ] .

Weaning and Discontinuation Avoid abrupt discontinuation of INOmax [see Warnings and Precautions (5.1) ]. To wean INOmax, downtitrate in several steps, pausing several hours at each step to monitor for hypoxemia.

💊 Dosage Forms and Strengths 33 words ▾

3 DOSAGE FORMS AND STRENGTHS INOmax (nitric oxide) gas is available in 800 and 4,880 ppm concentrations. INOmax (nitric oxide) is a gas available in 800 and 4,880 ppm concentrations ( 3 ).

⛔ Contraindications 23 words ▾

4 CONTRAINDICATIONS INOmax is contraindicated in neonates dependent on right-to-left shunting of blood. Neonates dependent on right-to-left shunting of blood ( 4 ).

⚠️ Warnings and Cautions ~2 min read ▾

5 WARNINGS AND PRECAUTIONS Rebound: Abrupt discontinuation of INOmax may lead to worsening oxygenation and increasing pulmonary artery pressure ( 5.1 ). Methemoglobinemia: Methemoglobin increases with the dose of nitric oxide; following discontinuation or reduction of nitric oxide, methemoglobin levels return to baseline over a period of hours ( 5.2 ). Elevated NO 2 Levels: Monitor NO 2 levels ( 5.3 ).

Heart Failure: In patients with pre-existing left ventricular dysfunction, INOmax may increase pulmonary capillary wedge pressure leading to pulmonary edema ( 5.4 ).

5.1Rebound Pulmonary Hypertension Syndrome following Abrupt Discontinuation Wean from INOmax [see Dosage and Administration (2.2) ]. Abrupt discontinuation of INOmax may lead to worsening oxygenation and increasing pulmonary artery pressure, i.e., Rebound Pulmonary Hypertension Syndrome. Signs and symptoms of Rebound Pulmonary Hypertension Syndrome include hypoxemia, systemic hypotension, bradycardia, and decreased cardiac output.

If Rebound Pulmonary Hypertension occurs, reinstate INOmax therapy immediately.

5.2Hypoxemia from Methemoglobinemia Nitric oxide combines with hemoglobin to form methemoglobin, which does not transport oxygen. Methemoglobin levels increase with the dose of INOmax; it can take 8 hours or more before steady-state methemoglobin levels are attained. Monitor methemoglobin and adjust the dose of INOmax to optimize oxygenation.

If methemoglobin levels do not resolve with decrease in dose or discontinuation of INOmax, additional therapy may be warranted to treat methemoglobinemia [see Overdosage (10) ].

5.3Airway Injury from Nitrogen Dioxide Nitrogen dioxide (NO 2 ) forms in gas mixtures containing NO and O 2 . Nitrogen dioxide may cause airway inflammation and damage to lung tissues. If there is an unexpected change in NO 2 concentration, or if the NO 2 concentration reaches 3 ppm when measured in the breathing circuit, then the delivery system should be assessed in accordance with the Nitric Oxide Delivery System O&M Manual troubleshooting section, and the NO 2 analyzer should be recalibrated.

The dose of INOmax and/or FiO 2 should be adjusted as appropriate.

5.4Worsening Heart Failure Patients with left ventricular dysfunction treated with INOmax may experience pulmonary edema, increased pulmonary capillary wedge pressure, worsening of left ventricular dysfunction, systemic hypotension, bradycardia and cardiac arrest. Discontinue INOmax while providing symptomatic care.

🤒 Adverse Reactions ~2 min read ▾

6 ADVERSE REACTIONS The following adverse reactions are discussed elsewhere in the label; Hypoxemia [see Warnings and Precautions (5.2) ] Worsening Heart Failure [see Warnings and Precautions (5.4) ] The most common adverse reaction is hypotension. ( 6 ). To report SUSPECTED ADVERSE REACTIONS, contact INO Therapeutics at 1-877-566-9466 and http://www.inomax.com/ 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. The adverse reaction information from the clinical studies does, however, provide a basis for identifying the adverse events that appear to be related to drug use and for approximating rates. Controlled studies have included 325 patients on INOmax doses of 5 to 80 ppm and 251 patients on placebo.

Total mortality in the pooled trials was 11% on placebo and 9% on INOmax, a result adequate to exclude INOmax mortality being more than 40% worse than placebo. In both the NINOS and CINRGI studies, the duration of hospitalization was similar in INOmax and placebo-treated groups. From all controlled studies, at least 6 months of follow-up is available for 278 patients who received INOmax and 212 patients who received placebo.

Among these patients, there was no evidence of an adverse effect of treatment on the need for rehospitalization, special medical services, pulmonary disease, or neurological sequelae. In the NINOS study, treatment groups were similar with respect to the incidence and severity of intracranial hemorrhage, Grade IV hemorrhage, periventricular leukomalacia, cerebral infarction, seizures requiring anticonvulsant therapy, pulmonary hemorrhage, or gastrointestinal hemorrhage. In CINRGI, the only adverse reaction (>2% higher incidence on INOmax than on placebo) was hypotension (14% vs.

11%).

6.2Post-Marketing Experience Post marketing reports of accidental exposure to nitric oxide for inhalation in hospital staff has been associated with chest discomfort, dizziness, dry throat, dyspnea, and headache.

🔄 Drug Interactions 40 words ▾

7 DRUG INTERACTIONS Nitric oxide donor compounds may increase the risk of developing methemoglobinemia ( 7 ).

7.1Nitric Oxide Donor Agents Nitric oxide donor agents such as prilocaine, sodium nitroprusside and nitroglycerine may increase the risk of developing methemoglobinemia.

👥 Use in Specific Populations 89 words ▾

8 USE IN SPECIFIC POPULATIONS

8.4Pediatric Use The safety and efficacy of nitric oxide for inhalation has been demonstrated in term and near-term neonates with hypoxic respiratory failure associated with evidence of pulmonary hypertension [see Clinical Studies (14.1) ]. Additional studies conducted in premature neonates for the prevention of bronchopulmonary dysplasia have not demonstrated substantial evidence of efficacy [see Clinical Studies (14.3) ]. No information about its effectiveness in other age populations is available.

8.5Geriatric Use Nitric oxide is not indicated for use in the adult population.

🧒 Pediatric Use 70 words ▾

8.4Pediatric Use The safety and efficacy of nitric oxide for inhalation has been demonstrated in term and near-term neonates with hypoxic respiratory failure associated with evidence of pulmonary hypertension [see Clinical Studies (14.1) ]. Additional studies conducted in premature neonates for the prevention of bronchopulmonary dysplasia have not demonstrated substantial evidence of efficacy [see Clinical Studies (14.3) ]. No information about its effectiveness in other age populations is available.

🧓 Geriatric Use 14 words ▾

8.5Geriatric Use Nitric oxide is not indicated for use in the adult population.

🆘 Overdosage 90 words ▾

10 OVERDOSAGE Overdosage with INOmax is manifest by elevations in methemoglobin and pulmonary toxicities associated with inspired NO 2 . Elevated NO 2 may cause acute lung injury. Elevations in methemoglobin reduce the oxygen delivery capacity of the circulation.

In clinical studies, NO 2 levels >3 ppm or methemoglobin levels >7% were treated by reducing the dose of, or discontinuing, INOmax. Methemoglobinemia that does not resolve after reduction or discontinuation of therapy can be treated with intravenous vitamin C, intravenous methylene blue, or blood transfusion, based upon the clinical situation.

🧬 Clinical Pharmacology ~2 min read ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action Nitric oxide relaxes vascular smooth muscle by binding to the heme moiety of cytosolic guanylate cyclase, activating guanylate cyclase and increasing intracellular levels of cyclic guanosine 3',5'-monophosphate, which then leads to vasodilation. When inhaled, nitric oxide selectively dilates the pulmonary vasculature, and because of efficient scavenging by hemoglobin, has minimal effect on the systemic vasculature. INOmax appears to increase the partial pressure of arterial oxygen (PaO 2 ) by dilating pulmonary vessels in better ventilated areas of the lung, redistributing pulmonary blood flow away from lung regions with low ventilation/perfusion (V/Q) ratios toward regions with normal ratios.

12.2Pharmacodynamics Effects on Pulmonary Vascular Tone in PPHN Persistent pulmonary hypertension of the newborn (PPHN) occurs as a primary developmental defect or as a condition secondary to other diseases such as meconium aspiration syndrome (MAS), pneumonia, sepsis, hyaline membrane disease, congenital diaphragmatic hernia (CDH), and pulmonary hypoplasia. In these states, pulmonary vascular resistance (PVR) is high, which results in hypoxemia secondary to right-to-left shunting of blood through the patent ductus arteriosus and foramen ovale.

In neonates with PPHN, INOmax improves oxygenation (as indicated by significant increases in PaO 2 ).

12.3Pharmacokinetics The pharmacokinetics of nitric oxide has been studied in adults. Absorption and Distribution Nitric oxide is absorbed systemically after inhalation. Most of it traverses the pulmonary capillary bed where it combines with hemoglobin that is 60% to 100% oxygen-saturated.

At this level of oxygen saturation, nitric oxide combines predominantly with oxyhemoglobin to produce methemoglobin and nitrate. At low oxygen saturation, nitric oxide can combine with deoxyhemoglobin to transiently form nitrosylhemoglobin, which is converted to nitrogen oxides and methemoglobin upon exposure to oxygen. Within the pulmonary system, nitric oxide can combine with oxygen and water to produce nitrogen dioxide and nitrite, respectively, which interact with oxyhemoglobin to produce methemoglobin and nitrate.

Thus, the end products of nitric oxide that enter the systemic circulation are predominantly methemoglobin and nitrate. Metabolism Methemoglobin disposition has been investigated as a function of time and nitric oxide exposure concentration in neonates with respiratory failure. The methemoglobin (MetHb) concentration-time profiles during the first 12 hours of exposure to 0, 5, 20, and 80 ppm INOmax are shown in Figure 1.

Figure 1: Methemoglobin Concentration-Time Profiles Neonates Inhaling 0, 5, 20 or 80 ppm INOmax Methemoglobin concentrations increased during the first 8 hours of nitric oxide exposure. The mean methemoglobin level remained below 1% in the placebo group and in the 5 ppm and 20 ppm INOmax groups but reached approximately 5% in the 80 ppm INOmax group. Methemoglobin levels >7% were attained only in patients receiving 80 ppm, where they comprised 35% of the group.

The average time to reach peak methemoglobin was 10 ± 9 (SD) hours (median, 8 hours) in these 13 patients, but one patient did not exceed 7% until 40 hours. Figure 1 Elimination Nitrate has been identified as the predominant nitric oxide metabolite excreted in the urine, accounting for >70% of the nitric oxide dose inhaled. Nitrate is cleared from the plasma by the kidney at rates approaching the rate of glomerular filtration.

🧬 Mechanism of Action 101 words ▾

12.1Mechanism of Action Nitric oxide relaxes vascular smooth muscle by binding to the heme moiety of cytosolic guanylate cyclase, activating guanylate cyclase and increasing intracellular levels of cyclic guanosine 3',5'-monophosphate, which then leads to vasodilation. When inhaled, nitric oxide selectively dilates the pulmonary vasculature, and because of efficient scavenging by hemoglobin, has minimal effect on the systemic vasculature. INOmax appears to increase the partial pressure of arterial oxygen (PaO 2 ) by dilating pulmonary vessels in better ventilated areas of the lung, redistributing pulmonary blood flow away from lung regions with low ventilation/perfusion (V/Q) ratios toward regions with normal ratios.

📦 How Supplied / Storage and Handling 209 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING INOmax (nitric oxide) is available in the following sizes: Size D Portable aluminum cylinders containing 353 liters at STP of nitric oxide gas in 800 ppm concentration in nitrogen (delivered volume 344 liters) (NDC 64693-002-01) Size 88 Aluminum cylinders containing 1963 liters at STP of nitric oxide gas in 800 ppm concentration in nitrogen (delivered volume 1918 liters) (NDC 64693-002-02) 0.4 liter Portable aluminum cylinders containing 78 liters at STP of nitric oxide gas in 4,880 ppm concentration in nitrogen (delivered volume 70 liters) (NDC 64693-003-01) Store at 25°C (77°F) with excursions permitted between 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].

All regulations concerning handling of pressure vessels must be followed. Protect the cylinders from shocks, falls, oxidizing and flammable materials, moisture, and sources of heat or ignition. INOmax MR conditional labeled cylinders (i.e., size 88 aluminum cylinder) may be used at 100 gauss or less.

Use of any other cylinders (e.g., size D or 0.4 liter aluminum cylinder) may create a projectile hazard. Occupational Exposure The exposure limit set by the Occupational Safety and Health Administration (OSHA) for nitric oxide is 25 ppm, and for NO 2 the limit is 5 ppm. For a list of patents, see https://www.mallinckrodt.com/patents/

📦 Storage and Handling 82 words ▾

Store at 25°C (77°F) with excursions permitted between 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. All regulations concerning handling of pressure vessels must be followed. Protect the cylinders from shocks, falls, oxidizing and flammable materials, moisture, and sources of heat or ignition.

INOmax MR conditional labeled cylinders (i.e., size 88 aluminum cylinder) may be used at 100 gauss or less. Use of any other cylinders (e.g., size D or 0.4 liter aluminum cylinder) may create a projectile hazard.

📋 Description 101 words ▾

11 DESCRIPTION INOmax (nitric oxide gas) is a drug administered by inhalation. Nitric oxide, the active substance in INOmax, is a pulmonary vasodilator. INOmax 800 ppm is a gaseous blend of nitric oxide (0.08%) and nitrogen (99.92%).

INOmax 4,880™ ppm is a gaseous blend of nitric oxide (0.488%) and nitrogen (99.51%). INOmax 800 ppm is supplied in aluminum cylinders as a compressed gas under high pressure (2,000 pounds per square inch [psi]). INOmax 4,880 ppm is supplied in aluminum cylinders as a compressed gas under high pressure (3,000 psi).

The structural formula of nitric oxide (NO) is shown below: Chemical Structure

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗
← 64679-0700-01 · Wockhardt 64693-0003-01 · INO →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.