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Assessment of pancreatic ductal penetration of antibiotics.

Pancreatic ductal penetration of antibiotics is not uniform. Antibiotic therapy for pancreatic and pancreatic related infections, theoretically, is enhanced by drugs that reach the ductal system. The pancreatic ductal penetrance of Cefamandol (1 gm), Amikacin (7.5 mg/kg), and Chloramphenicol (1 gm) given as a single intravenous dose prior to endoscopic retrograde cholangiopancreatography was studied in ten patients. Serum and pancreatic juice were collected simultaneously, frozen, and later assayed for antibiotic concentration. Each antibiotic achieved its expected therapeutic serum level. In contrast, pancreatic ductal levels of Cefamandol and Amikacin were subtherapeutic, whereas Chloramphenicol levels were therapeutic. Further studies are needed to identify other antibiotics with good pancreatic ductal penetrance.