Global Inhalation And Nasal Spray Generic Drugs Market By Drug Class (Inhaled corticosteroids, Short-acting and long-acting bronchodilators, Combination medications, Antihistamine, Decongestant, Others) By Indication(Asthma, COPD, Allergic rhinitis, Others) By Age Group (Pediatric, Adult, Geriatric) By Distribution Channel (Retail pharmacies, Hospital pharmacies, Online pharmacies) Region and Companies – Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2025-2034