The combined effects of terbinafine with itraconazole and amphotericin B against Cladophialophora carrionii, Phialophora verrucosa and Fonsecaea pedrosoi were evaluated in vitro by the checker-board method and expressed as a fractional inhibitory concentration (FIC) index. Synergy was observed with the combination of terbinafine and itraconazole against one isolate of C. carrionii and no antagonism was observed. When amphotericin B was combined with terbinafine or itraconazole, no synergy or antagonism was noted with all isolates included in this investigation.