Abstract:
OBJECTIVE:Assess the effects of linezolid on hematologic outcomes in newly diagnosed patients with acute myeloid leukemia (AML) following induction chemotherapy. DESIGN:Single-center, retrospective, observational, cohort study. SETTING:Large, tertiary care academic medical center. PATIENTS:A total of 225 patients ≥ 18 years admitted between December 2010 and 2013 with newly diagnosed AML were assessed for inclusion. Patients were identified through the use of ICD-9 codes and chemotherapy ordered via the computerized physician order entry system. Sixty-eight patients met inclusion criteria and were grouped into two arms based on antimicrobial treatment: LZD group (linezolid plus gram-negative antimicrobial, n=21) or control group (vancomycin or daptomycin plus gram-negative antimicrobial, n=47). INTERVENTIONS:The LZD group received linezolid ≥ 72 hours. The control group received vancomycin or daptomycin ≥ 72 hours. If patients switched extended gram-positive therapy, they were included in the LZD group as long as they had received ≥ 72 hours of linezolid. MEASUREMENTS/RESULTS:The primary end point of time to neutrophil recovery was not statistically different (28 days for LZD group vs 26 days for control group; p=0.675). The preplanned subgroup analysis of patients who received ≥ 14 days of linezolid demonstrated statistically similar median times to neutrophil recovery (29 days for LZD group vs 26 days for control group; p=0.487). Total duration of extended gram-positive antimicrobial therapy was significantly longer in the LZD group (27 days vs 16 days; p<0.001). Secondary end points not found to be statistically significant included platelet count at time of neutrophil recovery, duration of neutropenia, and length of hospital stay. CONCLUSIONS:There were no significant differences in hematologic outcomes in newly diagnosed AML patients who received linezolid for extended gram-positive antimicrobial coverage following induction chemotherapy. This study provides new insight with a primary focus on the effects of hematologic outcomes when using linezolid in a well-defined acute leukemia population. Further study is warranted with larger populations to assess the potential adverse effects linezolid may have in patients with acute leukemia.
journal_name
Pharmacotherapyjournal_title
Pharmacotherapyauthors
Nedved AN,DeFrates SR,Hladnik LM,Stockerl-Goldstein KEdoi
10.1002/phar.1824subject
Has Abstractpub_date
2016-10-01 00:00:00pages
1087-1094issue
10eissn
0277-0008issn
1875-9114journal_volume
36pub_type
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