1 2 Dificid (fidaxomicin) [prescribing information] Whitehouse Station, NJ: Merck; December 2015. ↑ Casellas JM, Israele V, Marín M, Ishida MT, Heguilen R, Soutric J, Arenoso H, Sibbald A, Stamboulian D (September 2005). "Amoxicillin-sulbactam versus amoxicillin-clavulanic acid for the treatment of non-recurrent-acute otitis media in Argentinean children". International Journal of Pediatric Otorhinolaryngology.