Pharmacological and toxicological aspects of fentanil: Review and synthesis of evidence. Research, Society and Development, [S. l.], v. 14, n. 4, p. e7614448616, 2025. DOI: 10.33448/rsd-v14i4.48616. Disponível em: https://rsdjournal.org/rsd/article/view/48616. Acesso em: 5 dec. 2025.