NCLEX Practice Questions: Quiz 370 November 6, 2015 By Rana Waqar Leave a Comment The nurse coordinates with the laboratory staff to have the gentamicin trough serum level drawn. At what time should the blood be drawn in relation to the administration of the I.V. dose of gentamicin sulfate (Garamycin)? 1. 2 hours before the administration of the next I.V. dose. 2. 3 hours before the administration of the next I.V. dose. 3. 4 hours before the administration of the next I.V. dose. 4. Just before the administration of the next I.V. dose. Δ
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