Euroclox (Ampicillin + Cloxacillin)“Euroclox is an antibiotic that contains ampicillin and cloxacillin. It is used to treat different bacterial infections, including those of the throat, chest, urinary tract, skin, and bones.”Disclaimer: This description is for general information only and should not replace medical advice. Take this medicine exactly as prescribed by your doctor or pharmacist. Complete the full course, even if you feel better, to stop the infection from coming back.