Product image of Nac (Acetylcysteine) supplied by GNH India

Nac

Active Ingredient:
Acetylcysteine
Origin:
EU

Nac (Acetylcysteine)

Acetylcysteine, the active ingredient in Nac, is a mucolytic agent presented as an oral formulation for oral use. It helps reduce the viscosity of mucus in the respiratory tract and is employed in chronic bronchitis, cystic fibrosis and other respiratory conditions.

GNH India supplies Nac as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Stada Arzneimittel Ag

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Indications & Clinical Uses

Acetylcysteine is used to improve mucus clearance in several respiratory disease groups.

  • Chronic bronchitis: thins airway secretions to ease cough and improve ventilation.
  • Cystic fibrosis: reduces mucus thickness, helping prevent respiratory complications.
  • Other respiratory conditions (e.g., COPD, asthma exacerbations): facilitates mucociliary clearance and eases breathing.

How It Works

  • Acetylcysteine cleaves disulfide bonds within mucus glycoproteins, breaking down the polymeric network and lowering viscosity. The resulting thinner mucus is more readily cleared by ciliary action. In addition, the compound serves as a precursor for intracellular glutathione, helping to restore antioxidant capacity in airway epithelial cells.

Side Effects

Acetylcysteine may cause a range of adverse reactions, most of which are mild and reversible.

Common Side Effects

  • Nausea: occasional upset stomach after oral intake.
  • Vomiting: may occur in sensitive individuals.
  • Diarrhea: loose stools are reported.
  • Abdominal discomfort: mild cramping or pain.
  • Rash or mild skin irritation.
  • Metallic taste in the mouth.

Serious or Rare Side Effects

  • Anaphylaxis: severe allergic reaction requiring immediate medical attention.
  • Severe bronchospasm: sudden narrowing of airways, especially in asthmatic patients.
  • Angioedema: swelling of face, lips, or tongue.
  • Hepatic dysfunction: abnormal liver enzyme elevations.
  • Stevens‑Johnson syndrome: rare severe skin reaction.
  • Eosinophilic pneumonia: uncommon inflammatory lung condition.

Precautions & Warnings

When prescribing acetylcysteine, clinicians should consider several safety aspects.

  • Renal impairment: monitor renal function and adjust therapy if needed.
  • Asthma or reactive airway disease: watch for bronchospasm after administration.
  • Pregnancy: evaluate risk‑benefit ratio and consult a healthcare professional.
  • Concomitant medications: review all drugs for potential interactions.
  • Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Acetylcysteine can affect the activity of several other medicines.

Major Interactions (Avoid)

  • Nitroglycerin: may cause profound hypotension.
  • Activated charcoal: reduces oral absorption of acetylcysteine.

Moderate Interactions (Monitor Closely)

  • Macrolide antibiotics (e.g., azithromycin): may increase gastrointestinal upset.
  • Bronchodilators: possible enhancement of bronchospasm risk.
  • Warfarin: may alter INR values, requiring closer coagulation monitoring.

Frequently Asked Questions

Nac contains acetylcysteine, a mucolytic agent that is used to thin and loosen mucus in the airways. It is commonly prescribed for chronic bronchitis, cystic fibrosis and other respiratory conditions where thick secretions impair breathing.

Acetylcysteine breaks disulfide bonds in mucus glycoproteins, reducing the polymeric structure and lowering viscosity. This makes the mucus easier for cilia to clear. Additionally, it replenishes intracellular glutathione, supporting antioxidant defenses in airway cells.

The dose of Nac is determined by the prescribing clinician based on the patient’s condition, age, weight and renal function. Healthcare professionals set the appropriate strength, frequency and duration for each individual case.

Safety data for acetylcysteine in pregnancy and lactation are limited. The prescriber should weigh potential benefits against possible risks and discuss the decision with the patient. If used, it should be under medical supervision.

To place an order, 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 necessary import documentation.

Acetylcysteine is distinguished by its dual action of breaking disulfide bonds in mucus and replenishing glutathione. Compared with agents such as carbocisteine or bromhexine, acetylcysteine often provides a more rapid reduction in mucus viscosity, though individual response and tolerability may vary.

Nac should be stored at ambient temperature, below 25 °C, in its original packaging. Keep the product away from moisture and direct sunlight to maintain stability. Do not store in a refrigerator unless otherwise specified by the manufacturer.

Nac is supplied as an oral formulation that is taken by mouth with or without water, as directed by the prescriber. The exact method—tablet, capsule or liquid—depends on the product specification and patient preference.

The most serious adverse reactions include anaphylaxis, severe bronchospasm, angioedema, hepatic dysfunction and rare skin conditions such as Stevens‑Johnson syndrome. Patients should seek immediate medical attention if they experience symptoms like difficulty breathing, swelling of the face or lips, or a widespread rash.

Nac is contraindicated in individuals with known hypersensitivity to acetylcysteine or any of its excipients. Patients with uncontrolled asthma or a history of severe bronchospasm should use it only under close medical supervision.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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