Procaterol is a short-acting β₂-adrenergic receptor agonist (SABA) used as a bronchodilator to relieve bronchospasm in patients with asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). It works by stimulating β₂ receptors in the bronchial smooth muscle, leading to relaxation and improved airflow. It is available in oral (tablet and syrup) and inhalation forms in some countries but is not FDA-approved in the United States.
Therapeutic indications include:
• Asthma (acute and maintenance treatment)
• Bronchial asthma in children
• Chronic obstructive pulmonary disease (COPD)
• Exercise-induced bronchospasm
Parent: Procaterol
Parent: Procaterol
Parent: Procaterol / Indacaterol
Parent: Procaterol
Impurities in procaterol arise mainly from its chiral synthesis, aromatic substitution reactions, and storage degradation, particularly due to its phenolic structure, which is prone to oxidation. Impurity control is regulated under ICH Q3A/B and ICH Q3D, especially for oral or inhalation products.
Process-Related Impurities
• Unreacted starting materials such as substituted phenols or amines
• Synthesis intermediates from halogenation or methylation steps
• Regioisomeric by-products from incorrect substitution on the aromatic ring
• Residual solvents such as methanol, ethanol, or toluene
• Impurities from chiral synthesis (e.g., undesired enantiomers or racemic forms)
Degradation Impurities
• Oxidation of phenolic groups forming quinones or colored degradation products
• Hydrolysis of side chains under high humidity or acidic conditions
• Light-induced degradation (photodegradation)
• Formation of impurity A (oxidized form) and other known degradation markers listed in pharmacopeial monographs
Elemental Impurities
• Trace metals such as iron, nickel, or copper from synthesis or equipment
• Controlled under ICH Q3D for oral and inhalation drug products
Analytical Techniques for Impurity Detection
Procaterol is used as a bronchodilator to relieve breathing difficulties associated with asthma and COPD.
It activates β₂-adrenergic receptors in bronchial smooth muscle, leading to muscle relaxation and airway dilation.
No. Procaterol is not FDA-approved but is available in some countries, particularly in Asia.
Store in a tightly closed container at controlled room temperature (15–25°C), protected from light, moisture, and air to avoid oxidation and degradation.
