Metacolina Lofarma

Methacholine, the active ingredient in Metacolina Lofarma, is a cholinergic agonist (muscarinic receptor agonist) presented as a solution for inhalation use. It induces bronchoconstriction to assess airway hyperresponsiveness in patients being evaluated for asthma.

GNH USA supplies Metacolina Lofarma as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Metacolina Lofarma is employed in diagnostic testing of the bronchial airway and related respiratory conditions.

Asthma diagnostic testing: enables controlled bronchoconstriction to confirm airway hyperresponsiveness. Airway hyperresponsiveness assessment: quantifies bronchial sensitivity in patients with suspected reactive airway disease. Clinical research on bronchial reactivity: provides a standardized agent for inhalation challenge protocols.

Adverse reactions may occur during or after inhalation of methacholine.

Common Side Effects: - Cough: transient irritation of the airway. - Throat irritation: mild discomfort during inhalation. - Dyspnea: shortness of breath that resolves with bronchodilator use. - Wheezing: audible airway narrowing. - Chest tightness: sensation of constriction in the chest. - Nausea: occasional gastrointestinal upset.

Serious or Rare Side Effects: - Severe bronchospasm: marked airway obstruction requiring emergency intervention. - Anaphylaxis: rare systemic allergic reaction. - Respiratory arrest: extremely rare, life‑threatening cessation of breathing. - Hypotension: significant drop in blood pressure. - Cardiac arrhythmia: irregular heart rhythm. - Pulmonary edema: fluid accumulation in the lungs.

Careful patient assessment and preparation are essential before performing a methacholine challenge.

Patient selection: avoid in individuals with severe obstructive lung disease or recent asthma exacerbation. Baseline lung function: obtain spirometry measurements prior to the test. Rescue medication: ensure short‑acting bronchodilator is immediately available. Monitoring: observe the patient continuously during and after inhalation. Contraindications: do not use in patients with known hypersensitivity to methacholine. Store at room temperature: keep in the original container, protect from moisture and light.

Methacholine may have interactions that affect test outcomes or patient safety.

Major Interactions (Avoid): - Beta‑agonists: can blunt the bronchoconstrictive response. - Anticholinergics: may reduce methacholine‑induced bronchoconstriction. - Recent inhaled corticosteroid use: can alter test sensitivity.

Moderate Interactions (Monitor Closely): - ACE inhibitors: may increase cough frequency. - Theophylline: can modify airway reactivity. - Smoking: may affect the magnitude of the bronchial response.