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Development of teicoplanin dosage guidelines for patients treated within an outpatient parenteral antibiotic therapy (OPAT) programme

Lamont, Elspeth and Seaton, R. Andrew and MacPherson, Merran and Semple, Lindsay and Bell, Emma and Thomson, A.H. (2009) Development of teicoplanin dosage guidelines for patients treated within an outpatient parenteral antibiotic therapy (OPAT) programme. Journal of Antimicrobial Chemotherapy, 64 (1). pp. 181-187. ISSN 0305-7453

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The long elimination half-life of teicoplanin facilitates outpatient parenteral antibiotic therapy (OPAT) with thrice-weekly dosing. This study aimed to develop teicoplanin dosage guidelines for OPAT use from routine clinical data. Patients received 15-25 mg/kg/day for 3 days, then 15-25 mg/kg thrice weekly. Trough concentrations were measured weekly and doses adjusted to maintain 20-30 or 10-20 mg/L according to clinical condition. Concentration-time data were analysed using the pharmacokinetic package NONMEM and the final model was used to develop new dosage guidelines. Data from 94 and 36 patients were used for model development and validation, respectively. Patient ages ranged from 15 to 94 years, weights from 43 to 146 kg and estimated CLCR from 9 to 195 mL/min. Teicoplanin concentrations (n = 670) ranged from 6.7 to 66.9 mg/L and a one-compartment model adequately described the data. The typical estimate of CL was 0.542 L/h and changed by 10.6% for every 10 mL/min difference from a CLCR of 66 mL/min. V was 1.62 L/kg. Dosage guidelines based on body weight and CLCR can be expected to lead to a significant improvement in the proportion of concentrations in the range 20-30 mg/L. Alternative doses aimed at lower target concentrations have also been developed. New dosage guidelines have been developed to support thrice-weekly administration of teicoplanin in an OPAT setting.