Advances in Inhaled Nanoparticle Drug Delivery for Pulmonary Disease Management

Pulmonary disorders, notably highlighted by the global impact of COVID-19, continue to pose serious public health concerns with limited treatment options. To address the urgent need for effective lung-targeted therapies, strategies that maximize local therapeutic efficacy while minimizing systemic toxicity are essential to the unique anatomical location of the lungs, inhaled therapy provides a promising strategy for locally targeted drug delivery through intranasal or intratracheal administration. Integrating biomedical nanotechnology and inhaled therapy, inhaled nanoparticle drug delivery systems (INDDs) have emerged as a powerful platform capable of penetrating mucus and pulmonary surfactant barriers, enhancing lung distribution and retention, and precisely delivering small molecules, proteins, and nucleic acids in lung lesions and cells using natural or synthetic carriers. The INDDs provide a universal translational platform for structurally analogous drugs and a wide array of respiratory disorders. This review summarizes recent advances in INDDs, focusing on the critical carrier materials in formulation, performance in in vitro and in vivo, and inhalation dosage forms, highlighting design strategies to overcome lung barriers and improve clinical and preclinical therapeutic efficacy in lung diseases.