amphotericin b + ciprofloxacin

Amphotericin b + ciprofloxacin is a combination of two pharmaceutical agents, each with distinct mechanisms of action. Amphotericin B is a polyene antifungal that binds to ergosterol in fungal cell membranes, creating pores and leading to cell death. Ciprofloxacin is a fluoroquinolone antibiotic that inhibits bacterial DNA gyrase and topoisomerase IV, enzymes essential for bacterial DNA replication and transcription. This combination has been studied primarily in vitro for its pharmacodynamic interactions against fungal pathogens such as Aspergillus fumigatus and Candida albicans. The combination demonstrates concentration-dependent synergy at low concentrations—enhancing antifungal activity beyond what either drug achieves alone—though antagonism can occur at higher concentrations not typically reached clinically[1][2][3]. Ciprofloxacin does not have direct antifungal activity but may exert immunomodulatory effects that enhance the efficacy of amphotericin B in the presence of immune cells[1][2]. There are no widely recognized brand names or fixed-dose commercial products containing both drugs together; their use as a combination is investigational or off-label.