Healthy Volunteers Clinical Trial
Official title:
The Effect of Dicloxacillin on Oral Absorption of Drugs
Worldwide there is an increase in antibiotic resistance which may have fatal long-term consequences. This is due to extensive use and sometimes misuse of antibiotics in the treatment of harmless infections. The primary aim of this study is to investigate if treatment with dicloxacillin can lead to drug-drug interactions through induction of the efflux transporter P-glycoprotein (P-gp). In this study it will also be investigated whether dicloxacillin induces its own metabolism. The hypothesis is based on a previous in vivo study showing that rifampicin induces the intestinal P-gp transporter, through activation of the pregnane X receptor (PXR). Dicloxacillin also activates the PXR receptor in vitro, which could result in an induction of P-gp in vivo. Trial subjects will ingest dicloxacillin for 30 days and at day 10 and 28 ingest dabigatran etexilate to determine if the P-gp transporter has been induced. Plasma and urine will be drawn over 32 hours to determine the concentration of dabigatran. Change in dicloxacillin concentration will also be measured at day 9 and 27 to establish if dicloxacillin induces its own metabolism.
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