What interaction concern involving oral anticoagulants is highlighted in the Renoxitin (cefoxitin sodium) product information?

Renoxitin (cefoxitin sodium) product information highlights potentiation of oral anticoagulant activity and uncontrolled INR during antibiotic therapy, with infection or inflammation, age and general condition as risk factors, while noting uncertainty over whether illness or treatment causes the INR disturbance.