Application Sulfaquinoxaline is a veterinary medicine used to treat coccidiosis. It is a protective agent against upper respiratory infections of poultry and a prophylactic against coccidiosis1,2. Biochem/physiol Actions Sulfaquinoxaline is an ionophorous antibiotic2 that inhibits vitamin K epoxidase (epoxide reductase, menadione epoxide reductase) and quinone reductase.