Embodiments are directed to a secnidazole formulations and the use of a secnidazole formulation for the treatment of bacterial vaginosis (BV). Embodiments described herein are directed to a method of treating bacterial vaginosis in a subject in need thereof comprising administering to the subject a therapeutically effective amount of secnidazole in a microgranule formulation. In some embodiments, the secnidazole in a microgranule formulation is administered orally. In some embodiments, the secnidazole in a microgranule formulation comprises a plurality of microgranules.