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. 11, p. 27–34, 2014. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/. Acesso em: 23 oct. 2026.