Kloxerate Gold DC Presentation Kloxerate Gold DC is an off-white stable intramammary suspension prepared under sterile conditions. Each single dose 5.4 g syringe contains: Cloxacillin (as Benzathine Salt) 600 mg Ampicillin (as the Trihydrate) in a long acting base 300 mg Ampicillin and Cloxacillin are semi‑synthetic penicillins derived from 6-amino-penicillanic acid.