Tedizolid Phosphate (TR-701 FA, MK-1986) vs Linezolid for the Treatment of Nosocomial Pneumonia (MK-1986-002)

Tedizolid Phosphate (TR-701 FA, MK-1986) vs Linezolid for the Treatment of Nosocomial Pneumonia (MK-1986-002)

A Phase 3 Randomized Double-blind Study Comparing TR-701 FA and Linezolid in Ventilated Gram-positive Nosocomial Pneumonia

This is a 1:1 ratio, randomized, double-blind, double-dummy, multicenter, global Phase 3 study of tedizolid phosphate (TR-701 FA) 200 mg intravenous (IV) once daily for 7 days versus linezolid (Zyvox®, Zyvoxid®, etc) 600 mg IV every 12 hours for 10 days for the treatment of ventilated participants with presumed gram-positive hospital-acquired bacterial pneumonia (HABP) or ventilator-associated bacterial pneumonia (VABP), collectively referred to as ventilated nosocomial pneumonia (VNP). Participants with concurrent gram-positive bacteremia are to receive 14 days of active therapy in either treatment arm. The primary objective is to determine the noninferiority (NI) in all-cause mortality (ACM) within 28 days after randomization of IV tedizolid phosphate compared with IV linezolid in the Intent to Treat (ITT) Analysis Set (NI is declared when the lower bound of the 95% CI > -10).

Ventilated HABP/VABP participants receive tedizolid phosphate 200 mg IV once daily for 7 days, or for 14 days for concurrent bacteremia.

Ventilated HABP/VABP participants receive linezolid 600 mg IV every 12 hours for 10 days, or for 14 days for concurrent bacteremia.

The numbers of participants with all-cause mortality within 28 days after randomization was determined in the ITT population. Any participants who were lost to follow-up and not known to be alive or deceased by Day 28 were imputed as deceased.

Number of Participants With All-Cause Mortality in the Microbiological Intent-to-Treat (mITT) Population

The numbers of participants with all-cause mortality within 28 days after randomization was determined in the mITT population. Any participants who were lost to follow-up and not known to be alive or deceased by Day 28 were imputed as deceased.

The clinical response in the ITT population at the TOC visit (derived from the Investigator's assessment at the EOT and TOC visits) was determined by the investigator to be either: clinical success, clinical failure, or indeterminate. Clinical success was declared when most or all clinical signs were completely resolved, with no new signs of infection, no additional antibiotic therapy was required, and the participant was alive. Indeterminate was declared when the investigator could not determine success or failure. Clinical failure was declared with progression, relapse, or recurrence of new symptoms of infection, or a persistence or insufficient improvement in signs and symptoms of VNP.

The clinical response in the CE population at the TOC visit (derived from the Investigator's assessment at the EOT and TOC visits) was determined by the investigator to be either: clinical success, clinical failure, or indeterminate. Clinical success was declared when most or all clinical signs were completely resolved, with no new signs of infection, no additional antibiotic therapy was required, and the participant was alive. Indeterminate was declared when the investigator could not determine success or failure. Clinical failure was declared with progression, relapse, or recurrence of new symptoms of infection, or a persistence or insufficient improvement in signs and symptoms of VNP.

Number of Methicillin-Susceptible Staphylococcus Aureus (MSSA)-Infected Participants With All-Cause Mortality in the Microbiological Intent-to-Treat (mITT) Population

The number of MSSA-infected participants with all-cause mortality within 28 days after randomization was determined in the mITT population. Participants who had confirmed MSSA culture results from respiratory tract or pleural fluid specimens obtained within 36 hours of study Day 1 were included. Any participants who were lost to follow-up and not known to be alive or deceased by Day 28 were imputed as deceased.

Number of Methicillin-Resistant Staphylococcus Aureus (MRSA)-Infected Participants With All-Cause Mortality in the Microbiological Intent-to-Treat (mITT) Population

The number of MRSA-infected participants with all-cause mortality within 28 days after randomization was determined in the mITT population. Participants who had confirmed MRSA culture results from respiratory tract or pleural fluid specimens obtained within 72 hours of study Day 1 were included. Any participants who were lost to follow-up and not known to be alive or deceased by Day 28 were imputed as deceased.

Number of Participants With a Favorable Response at End-of-Therapy (EOT) Visit in the Microbiological Intent-to-Treat (mITT) Population

The number of patients in the mITT population with a favorable response at EOT was determined. Favorable response included eradication (absence of the baseline pathogen) and presumed eradication (no source specimen to culture in a participant assessed as a clinical cure by the investigator).

Number of Participants With a Favorable Response at End-of-Therapy (EOT) Visit in the Microbiologically-Evaluable 1 (ME-1) Population

The number of patients in the ME-1 population with a favorable response at EOT was determined. Favorable response included eradication (absence of the baseline pathogen) and presumed eradication (no source specimen to culture in a participant assessed as a clinical cure by the investigator).

Number of Participants With a Favorable Response at Test-of-Cure (TOC) Visit in the Microbiological Intent-to-Treat (mITT) Population

The number of patients in the mITT population with a favorable response at TOC was determined. Favorable response included eradication (absence of the baseline pathogen) and presumed eradication (no source specimen to culture in a participant assessed as a clinical cure by the investigator).

Number of Participants With a Favorable Response at Test-of-Cure (TOC) Visit in the Microbiologically-Evaluable 2 (ME-2) Population

The number of patients in the ME-2 population with a favorable response at TOC was determined. Favorable response included eradication (absence of the baseline pathogen) and presumed eradication (no source specimen to culture in a participant assessed as a clinical cure by the investigator).

An AE is any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. Safety analysis is based on actual treatment received instead of randomization.

An AE is any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. Safety analysis was based on actual treatment received and not randomization.

Inclusion Criteria: Requires IV antibiotic therapy with diagnosis of ventilated nosocomial pneumonia Gram-positive bacteria on respiratory Gram stain Exclusion Criteria: Pneumonia of community, viral, fungal or parasitic etiology Structural lung abnormalities Immunosuppression Previous antibiotics for > 24 hours Expected survival of < 72 hours

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