4.7 Article

Oral antimicrobial agents in patients with short bowel syndrome: worth a try!

Journal

JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY
Volume 78, Issue 8, Pages 2008-2014

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/jac/dkad198

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This study aimed to determine the bioavailability of orally administered antimicrobial agents commonly used for treatment in SBS patients. The results showed that the bioavailability of selected antimicrobial agents in certain SBS patients appeared to be better than expected, providing a feasible treatment option. However, therapeutic drug monitoring should be part of the treatment process to safeguard adequate exposure in all patients, due to the large observed differences between patients.
Background The use of oral antimicrobial agents in patients with short bowel syndrome (SBS) is challenging due to the changes in gastrointestinal anatomy that may result in diminished absorption and altered drug bioavailability. Prospective studies evaluating bioavailability of antimicrobial agents after oral administration in SBS patients are lacking. Objectives To determine the bioavailability of orally administered antimicrobial agents commonly used for treatment in SBS patients to guide clinical decision making when faced with infections. Methods We performed an explorative, clinical study investigating the pharmacokinetics (PK) of clindamycin, ciprofloxacin, flucloxacillin and fluconazole in SBS patients with intestinal failure. Participants received a combination of two antimicrobial agents simultaneously. To determine the oral bioavailability, participants received a single oral and IV dose of both agents on two occasions, after which they underwent intensive PK sampling on six predefined time points up to 12 hours after administration. Primary outcome was the oral bioavailability of these antimicrobial agents. Secondary outcomes were intravenous PK characteristics following non-compartmental analysis. Results Eighteen SBS patients were included: the mean (SD) age was 59 (17) years and 61% of participants were female. The median observed (IQR) bioavailability of ciprofloxacin, clindamycin, flucloxacillin and fluconazole were 36% (24-50), 93% (56-106), 50% (32-76) and 98% (61-107), respectively. Conclusion The bioavailability of selected antimicrobial agents in certain patients with SBS appeared to be better than expected, providing a feasible treatment option. Due to the large observed differences between patients, therapeutic drug monitoring should be part of the treatment to safeguard adequate exposure in all patients.

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