Development and Validation of RP-HPLC Method For Simultaneous Determination of Guaifenesin Impurities in Multi Drug Combinations. Global Journal of Medical Research, [S. l.], v. 14, n. B2, p. 27–34, 2014. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/564. Acesso em: 21 feb. 2026.