Post-ERCP Antibiotic Regimen for High-Risk Patients

Patient Selection for Prophylactic Antibiotics

Patients with incomplete or difficult biliary drainage should receive prophylactic antibiotics 2
Patients with primary sclerosing cholangitis (PSC) should receive prophylactic antibiotics 1, 2

For patients with suspected MDR organisms or immunocompromised, meropenem 1g every 6 hours by extended infusion or continuous infusion is recommended 3, 4
For patients with suspected MDR organisms or immunocompromised, doripenem 500 mg every 8 hours by extended infusion or continuous infusion is recommended 3, 4
For patients with suspected MDR organisms or immunocompromised, imipenem/cilastatin 500 mg every 6 hours by extended infusion is recommended 3, 4
For patients with beta-lactam allergy, eravacycline 1 mg/kg every 12 hours is recommended 3, 4

For patients with established infection (cholangitis), antibiotic therapy should be administered for 4 days in immunocompetent and non-critically ill patients if source control is adequate 5
For immunocompromised or critically ill patients with established infection, antibiotic therapy should be administered for up to 7 days based on clinical conditions and inflammatory markers if source control is adequate 5

Meta-analyses show prophylactic antibiotics prevent cholangitis (RR: 0.54), septicemia (RR: 0.35), and bacteremia (RR: 0.50) 2

Monitor for signs of infection, including fever, increased white blood cell count, and C-reactive protein elevation 3, 4
Procalcitonin is the most sensitive laboratory test for detection of infection 3, 4
For persistent symptoms despite antibiotic therapy, consider diagnostic investigation for ongoing infection 5
Bile fluid sampling during ERCP can guide antibiotic treatment if cholangitis occurs despite prophylaxis 2