Efficacy and safety of tramadol in patients with premature ejaculation: evidence based review. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 33, n. 6, p. 394–400, 2017. DOI: 10.32385/rpmgf.v33i6.12300. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/12300. Acesso em: 17 apr. 2026.