Monitor creatinine at least 3 times/week; discontinue if any signs of ototoxicity.
For BID dosing: Target Peak 15-30 mg/L, Trough <5 mg/L. Peak levels usually not required but if drawn, record time of dose and time of level drawn as accurately as possible.
Consult pharmacist for level interpretation and dose individualization.
For once daily dosing: Target Trough <1 mg/L. Peak levels not recommended.