The nurse is administering an antibiotic intravenously. Which blood level determines the lowest amount of medication present in the patient?
a. Peak
b. Serum
c. Therapeutic
d. Trough
ANS: D
The lowest amount of a medication in the blood is the trough. The peak is the highest amount of medication in the blood. Serum level identifies the amount of medication present. Therapeutic levels identify the range in which a medication is effective.
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