What does the second letter 'N' in the Orange Book indicate?

The second letter 'N' in the Orange Book indicates that a drug product is classified as an aerosol. The Orange Book, officially known as the "Approved Drug Products with Therapeutic Equivalence Evaluations," provides valuable information on the therapeutic equivalence of drug products. Specifically, when you see the designation with 'N,' it signifies that the product forms an aerosol, which can be pertinent in determining the appropriate formulation for delivery to patients, particularly for respiratory therapies. Understanding this classification helps pharmacy technicians and healthcare professionals identify the correct dosage form and delivery method for specific medications, ensuring improved patient care and medication management.