Desired vancomycin trough is 10-20mg/L. Monitor renal function closely. See Vancomycin Dosing & Monitoring Guidelines.
Linezolid preferred over vancomycin if:
MRSA with vancomycin MIC ≥ 1.5µg/mL
concomitant nephrotoxic therapy
pre-existing renal dysfunction.
Minimum 14 days for confirmed MRSA.