Metacolina Lofarma

Methacholine chloride, the active ingredient in Metacolina Lofarma, is a muscarinic receptor agonist presented as an inhalation solution for inhalation use. It directly stimulates airway muscarinic receptors to provoke bronchoconstriction, enabling a controlled bronchial challenge test that helps diagnose asthma and assess airway hyper‑responsiveness in suspected patients.

GNH USA supplies Metacolina Lofarma as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, providing reliable sourcing for diagnostic agents used in respiratory medicine and research institutions across multiple regions.

Methacholine chloride is used in respiratory diagnostic testing to evaluate airway hyperresponsiveness. - Bronchial challenge test for asthma diagnosis: provokes controlled bronchoconstriction to assess airway hyperresponsiveness. - Evaluation of suspected asthma in adults: helps differentiate asthma from other respiratory conditions. - Research studies of airway physiology: provides a standardized agent for experimental bronchial provocation.

Methacholine chloride may cause several adverse reactions during bronchial challenge testing.

Common Side Effects: - Cough: transient irritation of the airway. - Throat irritation: mild discomfort after inhalation. - Transient wheezing: short‑lasting airway narrowing. - Mild dyspnea: temporary shortness of breath. - Headache: occasional post‑procedure symptom. - Nausea: mild gastrointestinal upset.

Serious or Rare Side Effects: - Severe bronchospasm: marked airway constriction requiring emergency treatment. - Hypoxemia: significant drop in blood oxygen levels. - Cardiac arrhythmias: irregular heart rhythms in susceptible individuals. - Anaphylaxis: rare systemic allergic reaction. - Pulmonary edema: fluid accumulation in lungs. - Persistent respiratory distress: prolonged difficulty breathing after the test.

When using methacholine chloride for bronchial challenge testing, several safety measures are essential. - Patient selection: avoid in individuals with severe obstructive lung disease. - Baseline lung function: perform spirometry before the test to establish reference values. - Rescue medication: have a short‑acting bronchodilator readily available. - Monitoring: observe the patient continuously during and after administration. - Contraindications: do not use in patients with known hypersensitivity to methacholine or related compounds. - Store at room temperature: keep in the original container, protect from light and moisture.

Methacholine chloride can interact with other medications that affect airway tone or bronchial reactivity.

Major Interactions (Avoid): - Beta‑agonists: may blunt the bronchoconstrictive response, reducing test sensitivity. - Anticholinergics: may inhibit methacholine effect, leading to false‑negative results. - MAO inhibitors: potential for exaggerated bronchospasm.

Moderate Interactions (Monitor Closely): - Corticosteroids: may reduce airway reactivity, requiring interpretation adjustment. - Theophylline: may modify response; monitor lung function closely. - ACE inhibitors: can increase cough, potentially confounding test results.