Print the DrugDrug File by I.Class Codes Print the DrugDrug File by I.Class Codes Print the DrugDrug File by I.Class Codes 7/09/1997 Drug A / Drug B Clinical significance Last updated 301 ANTICOAGULANTS H 7/01/97 320 PENICILLIN CLINICAL SIGNIFICANCE: HIGH ACTION: Patients stabilized on an oral anti-coagulant are at a higher risk of developing bleeding complications if large IV doses of penicillin are also administered. This interaction may be due to a combined inhibition of ADP-induced platelet aggregation. This interaction is dose-dependent. RECOMMENDATIONS: Patients receiving large doses of an IV penicillin should have their coagulation status monitored more closely. The dose of one or both medications should be adjusted accordingly, or an alternate antibiotic selected. ref. DIAM p. 225, 402, 422; DIF #88 Page 809