A nurse is caring for a client who has an infection and a prescription for gentamicin intermittent IV bolus every 8 hr. A peak and trough is required with the next dose. Which of the following actions should the nurse take to obtain an accurate gentamicin serum level?

A. Draw a trough level immediately prior to administering the medication and a peak level 30 min after the dose.: The trough level should be drawn just before the next dose is given (immediately prior to administration), and the peak level should be drawn 30 minutes after the dose for an IV bolus, as this reflects the highest serum concentration of the drug. B. Draw a trough level at 0900 and a peak level at 2100.: This is incorrect because trough levels should be measured right before the next dose, not at a set time like 0900. The peak level should be measured 30 minutes after the IV dose, not at 2100. C. Draw a peak level at 0900 and a trough level at 2100.: This is incorrect because the peak level should be drawn 30 minutes after the IV dose, not at 0900. The trough level should be drawn just before the next dose, not at 2100 unless it coincides with the next dose. D. Draw a peak level 90 min prior to administering the medication and a trough level 90 min after the dose.: The peak level should be drawn 30 minutes after the dose, not 90 minutes prior. The trough level should be drawn immediately before administering the next dose, not 90 minutes after.