How should a nurse handle a drug with a narrow therapeutic index?

• A. By administering the drug cautiously with minimal monitoring
• B. By closely monitoring the patient's response and serum drug levels
• C. By changing the dosage frequently based on patient feedback
• D. By consulting other nurses for better management strategies

Answer: (B)

When a drug has a narrow therapeutic index, it means that there is a small margin between the effective dose and the toxic dose. This characteristic necessitates a careful approach to medication administration to ensure patient safety and therapeutic effectiveness. Close monitoring of the patient’s response and serum drug levels is crucial, as it allows the nurse to detect any potential adverse effects or inadequate therapeutic response early on. This vigilant approach can help in adjusting dosages appropriately and timely, thereby minimizing risks and optimizing treatment outcomes.

Monitoring serum drug levels is particularly important because it provides objective data regarding the drug concentration in the bloodstream, guiding the nurse in determining whether the dose needs to be altered. Additionally, observing the patient's clinical response allows for immediate identification of any side effects or complications that may arise from the medication, further ensuring patient safety.

Overall, this careful and proactive monitoring aligns with best practices for handling medications that require precise dosing parameters. This is vital not just for patient safety but also for achieving the intended therapeutic effects of the drug.