Pharmacokinetic and Pharmacodynamic Evaluation of Linezolid Administered Intravenously in MRSA-positive, Morbidly Obese Patients With Pneumonia


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Study Location
Ghent University Hospital
Ghent, , 9000, Belgium


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Descriptive Information
Brief Title  ICMJE Pharmacokinetic and Pharmacodynamic Evaluation of Linezolid Administered Intravenously in MRSA-positive, Morbidly Obese Patients With Pneumonia
Official Title  ICMJE Pharmacokinetic and Pharmacodynamic Evaluation of Linezolid Administered Intravenously in MRSA-positive, Morbidly Obese Patients With Pneumonia
Brief Summary

The objectives of the study are:

(i) to evaluate the proportion of patients who attain a T>MIC (Minimum Inhibitory Concentration) of 100% and the time frame in which they do so. The investigators therefore plan to measure unbound linezolid trough concentrations before administration of the second, third, fourth and fifth dose. Furthermore, the investigators will assess the AUC0 - 24h/MIC in all study subjects. Therefore, multiple plasma samples will be drawn after the fourth or fifth dose, when steady state conditions are reached.

(ii) to describe the pharmacokinetic variability of unbound linezolid concentrations in this cohort using a population pharmacokinetic model and to assess the expected probability of target attainment (PTA) by MIC against MRSA.

Twenty adult, MRSA-positive, morbidly obese patients with clinically and radiologically documented pneumonia are to be included. Therefore, a multi-centre, international observational study is necessary. Given the specific target population this study is not feasible in a single-centre approach. The goal is to find up to 6 centres that anticipate including 3 to 4 patients in the study within a time frame of one year.

Included patients should receive at least 6 doses of linezolid. Linezolid must be administered intravenously (iv) over a one hour controlled infusion (with use of a volumetric infusion pump).

Detailed Description Not Provided
Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 4
Study Design  ICMJE Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Condition  ICMJE Pneumonia
Intervention  ICMJE Drug: Linezolid
600 mg linezolid as a 1 hour controlled infusion (acceptable time frame is between 30 and 120 minutes), twice, at least 3 days.
Study Arms  ICMJE Experimental: Linezolid
Intervention: Drug: Linezolid
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Unknown status
Estimated Enrollment  ICMJE
 (submitted: March 4, 2013)
Original Estimated Enrollment  ICMJE Same as current
Estimated Study Completion Date  ICMJE December 2015
Estimated Primary Completion Date December 2015   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE
  • BMI >35
  • Radiographically and clinically documented pneumonia and one of the following:

    • the patient is MRSA screen-positive and is as such at high risk for MRSA pneumonia (MIC for linezolid is known or possible to assess)
    • the patient has a baseline respiratory tract sample positive for MRSA; MRSA pneumonia is likely
    • empiric therapy without linezolid is initiated (no obvious indication for MRSA involvement), but the patient is switch to linezolid therapy once culture results demonstrate MRSA as pathogen. CAVE: the patients must be included in the study prior to the moment the first trough sample must be drawn. As such, patients becoming MRSA-positive after >1 dose of linezolid cannot be included in the study.
  • Decision to start treatment with linezolid for at least 3 days (6 doses of 600 mg).
  • Patient is colonized or infected with MRSA (at any site) and it must be possible to sent a fresh isolate to the central laboratory for microbiology.
  • Written informed consent by the patient or his/her legal representative.


Contraindications as described in the summary of product characteristics (SPC).

Sex/Gender  ICMJE
Sexes Eligible for Study:All
Ages  ICMJE 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Belgium
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT01805284
Other Study ID Numbers  ICMJE 2012/788
2012-005127-33 ( EudraCT Number )
Has Data Monitoring Committee No
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party University Ghent
Study Sponsor  ICMJE University Ghent
Collaborators  ICMJE
  • University Hospital, Ghent
  • Pfizer
Investigators  ICMJE
Principal Investigator:Dirk Vogelaers, Ph.D., M.D.University Hospital, Ghent
PRS Account University Ghent
Verification Date June 2015

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP