Chloramphenicol and phenobarbitone--a drug interaction.

Abstract
Infants (2) with bacterial meningitis who were treated with phenobarbitone and high-dose chloramphenical showed progressive falls in the peak blood levels of chloramphenicol. A standard chloramphenicol dose of 50 mg/kg daily would have produced subtherapeutic blood levels after only a few days. The importance of measuring serial blood chloramphenicol concentrations is stressed.