Figure 4. Linezolid (LZD) usage during 2001–2005 at hospital A, Tennessee. Use of oral and intravenous (IV) formulations is shown in defined daily doses (DDD)/1,000 patient days. Data for 2001 and 2005 do not include all 12 months (2001 includes data from October through December; 2005 includes data from January through February). ICU, intensive care unit.