Current Technological Advances in Mucoadhesive Buccal Drug Delivery Systems and Their Therapeutic Applications

Buccal drug delivery has emerged as a promising route of administration, offering distinct advantages over conventional oral delivery systems. The unique physiological characteristics of the buccal mucosa, including rich vascularity and relatively high permeability, make it an attractive site for both local and systemic drug administration. Bioadhesive formulations have revolutionized buccal drug delivery by ensuring prolonged contact with the mucosal surface, thereby enhancing drug absorption and bioavailability. Recent developments in polymer science have introduced novel mucoadhesive materials, including thiolated polymers, lectins, and stimuli-responsive systems, which demonstrate superior adhesion properties and controlled release characteristics. Various formulation approaches, such as films, tablets, patches, and hydrogels, have been developed to optimize drug delivery through the buccal route. These systems incorporate permeation enhancers, enzyme inhibitors, and novel drug carriers to overcome the biological barriers associated with buccal delivery. The application of nanotechnology has further advanced the field, introducing nanostructured formulations that exhibit enhanced mucoadhesion and improved drug permeation. Current research focuses on developing intelligent delivery systems that respond to physiological triggers and maintain therapeutic drug levels. Understanding the critical factors affecting bioadhesion, including polymer characteristics, environmental conditions, and physiological variables, has led to the development of more effective formulations. The integration of modern analytical techniques and quality control measures ensures the development of stable and efficient buccal delivery systems and improves patient compliance and therapeutic outcomes