Product image of Inomax (Nitric Oxide) supplied by GNH India

Inomax

Active Ingredient:
Nitric Oxide
Origin:
EU

Inomax (Nitric Oxide)

Nitric Oxide, the active ingredient in Inomax, is a vasodilator presented as a medical gas for endotracheopulmonary use. It is employed to manage neonatal respiratory failure, persistent pulmonary hypertension of the newborn, and acute pulmonary hypertension in adults.
GNH India supplies Inomax as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals worldwide.

Manufacturer / TM Owner

Linde Healthcare Ab

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Indications & Clinical Uses

  • Inomax acts on the pulmonary vascular system to lower resistance and improve oxygenation in specific respiratory conditions.
  • Neonatal respiratory failure: improves oxygen exchange by reducing pulmonary vascular resistance.
  • Persistent pulmonary hypertension of the newborn: provides selective pulmonary vasodilation to support transition to normal circulation.
  • Acute pulmonary hypertension in adults: lowers pulmonary arterial pressure and enhances right‑ventricular function.

How It Works

  • Inomax delivers inhaled nitric oxide, which diffuses into pulmonary vascular smooth muscle cells and activates soluble guanylate cyclase. This enzyme catalyzes the conversion of GTP to cyclic GMP, raising intracellular cGMP levels and causing relaxation of smooth muscle. The result is selective dilation of pulmonary vessels without significant systemic vasodilation.

Side Effects

Inomax may be associated with several adverse reactions that clinicians monitor during therapy.

Common Side Effects

  • Transient hypotension
  • Methemoglobinemia (mild)
  • Rebound pulmonary hypertension after abrupt discontinuation
  • Headache or facial flushing
  • Nausea or vomiting

Serious or Rare Side Effects

  • Severe hypotension leading to organ hypoperfusion
  • High‑grade methemoglobinemia requiring intervention
  • Pulmonary edema
  • Significant bleeding in patients on anticoagulants
  • Allergic or anaphylactoid reactions

Precautions & Warnings

When using Inomax, clinicians should observe specific safety measures.

  • Blood pressure monitoring: check systemic and pulmonary pressures regularly.
  • Methemoglobin levels: measure to detect accumulation, especially with prolonged use.
  • Hemolytic disease: avoid or use with caution in patients with severe hemolysis.
  • Anemia: assess hemoglobin and avoid in severe cases.
  • Concurrent inhaled NO therapies: adjust dose to prevent excess vasodilation.
  • Store at ambient temperature: keep cylinders in original packaging, protect from heat and direct sunlight.

Avoid Interactions

Inomax can interact with other agents that affect vascular tone or hemoglobin.

Major Interactions (Avoid)

  • Phosphodiesterase‑5 inhibitors (e.g., sildenafil) – risk of profound hypotension.
  • Other nitric oxide donors – additive vasodilatory effect.
  • Nitroglycerin – excessive systemic blood pressure drop.
  • Methylene blue – may antagonize nitric oxide effect.
  • Inhaled anesthetics that potentiate vasodilation.

Moderate Interactions (Monitor Closely)

  • Anticoagulants – increased bleeding risk.
  • High‑concentration oxygen therapy – may affect NO metabolism.
  • Certain antibiotics (e.g., sulfonamides) – potential oxidative stress.
  • Other pulmonary vasodilators – cumulative effect on pulmonary pressure.
  • Drugs influencing hemoglobin affinity – monitor methemoglobin formation.

Frequently Asked Questions

Inomax is a prescription medical gas containing nitric oxide that is used to treat neonatal respiratory failure, persistent pulmonary hypertension of the newborn, and acute pulmonary hypertension in adults by selectively dilating the pulmonary vessels and improving oxygenation.

Nitric oxide released from Inomax diffuses into the smooth muscle of pulmonary arteries, activates soluble guanylate cyclase, raises cyclic GMP levels, and causes relaxation of the vascular smooth muscle. This selective pulmonary vasodilation reduces vascular resistance without markedly affecting systemic blood pressure.

The dose of Inomax is individualized and set by the treating physician based on the patient’s age, weight, severity of pulmonary hypertension, and response to therapy. Clinicians adjust the inhaled concentration and duration according to clinical guidelines and monitoring results.

Safety data for Inomax during pregnancy and lactation are limited. The product should only be used if the potential benefit justifies any potential risk to the fetus or infant, and the decision must be made by the prescribing clinician.

To order Inomax, submit an enquiry on the product page at gnhindia.com specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any cold‑chain requirements), and import documentation.

Inomax delivers inhaled nitric oxide, offering rapid and selective pulmonary vasodilation with minimal systemic effects, unlike oral phosphodiesterase‑5 inhibitors or intravenous prostacyclin analogues that have broader systemic actions. Its short half‑life allows precise titration, but it requires specialized delivery equipment.

Inomax cylinders should be stored at ambient temperature, away from direct sunlight and heat sources. Keep them in the original packaging, secure them upright, and ensure proper ventilation. Follow local regulations for medical gas storage and handle cylinders with appropriate protective equipment.

Inomax is administered via an endotracheopulmonary delivery system that introduces the gas into the patient’s airway during mechanical ventilation or spontaneous breathing. The inhaled concentration is continuously monitored, and therapy is adjusted based on pulmonary artery pressure and oxygenation parameters.

The most serious risks include severe hypotension, high‑grade methemoglobinemia, rebound pulmonary hypertension after abrupt discontinuation, and rare allergic reactions. Continuous monitoring of blood pressure, methemoglobin levels, and pulmonary hemodynamics is essential to detect these complications early.

Inomax should be avoided in patients with known hypersensitivity to nitric oxide, severe anemia, significant hemolytic disease, or uncontrolled systemic hypotension. It is also contraindicated in individuals where rapid withdrawal could precipitate rebound pulmonary hypertension without proper weaning protocols.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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