Samples are usually collected in pairs as Trough level (within 1 hr before the next dose) and Peak level (1 hr post end of infusion).*
If once daily dosing is used, a single sample may be collected between 8 and 12 hr post dose (random). Samples will be registered as 'pre dose (trough)' or 'post dose (random)'.*
Please state whether the sample is pre or post dose.