Florfenicol in Cattle Choose route: IM | IV | SC Intramuscular (IM) Reference for this graph: Lacroix 2011, Soback 1995 Intravenous (IV) Reference for this graph: Bretzlaff 1986, Gilliam 2008, Soback 1995 Subcutaneous (SC) Reference for this graph: Lacroix 2011 CLSI Breakpoint Information