CBC with differential, electrolytes, urea, creatinine, liver function tests (ALT, AST) before therapy and twice weekly
When ordering levels first call either of the following to obtain authorization to do levels.
Peak Level: 50-100 mg/L drawn 30 minutes after completion of a 30 minute IV infusion
Trough level: 25-50 mg/L
For IV Administration: Obtain Peak and trough levels after third dose when starting treatment and after every change in dose.
For Oral Administration: Obtain trough level prior to the third dose when starting treatment and after every change in dose.