MFS-type efflux transporter; part of the gene cluster that mediates the biosynthesis of the cytotoxic leucine-containing cytochalasans, including aspochalasin C, aspochalasin E, TMC-169, flavichalasine F, aspergillin PZ, aspochalasin M and flavichalasine G (PubMed:32913332). FfsH might be involved in the excretion of cytochalasans (Probable). Belongs to the major facilitator superfamily.