Research Trends and Challenges in Natural Polymer-Based Drug Delivery Systems: A Bibliometric and Narrative Review. International Journal of Pharmaceutical Drug Design, [S. l.], v. 3, n. 1, p. 131–138, 2026. DOI: 10.62896/ijpdd.3.1.18. Disponível em: https://ijpdd.org/index.php/files/article/view/368. Acesso em: 23 apr. 2026.