Which of the following is an IV medication that has a narrow therapeutic index and requires periodic laboratory monitoring to prevent patient harm?

Rationale

Vancomycin is an IV medication that has a narrow therapeutic index and requires periodic laboratory monitoring to prevent patient harm.

Vancomycin is known for its narrow therapeutic index, meaning that the range between effective and toxic doses is small. This necessitates careful monitoring of drug levels in the blood to avoid adverse effects and ensure therapeutic efficacy.

A (Varenicline) YOUR ANSWER

Varenicline is primarily used as a smoking cessation aid and is administered orally rather than intravenously. While it does require monitoring for neuropsychiatric side effects, it does not have a narrow therapeutic index that necessitates routine laboratory tests.

B (Venlafaxine) YOUR ANSWER

Venlafaxine is an antidepressant that also does not require intravenous administration. Although it may necessitate monitoring for blood pressure changes and serotonin syndrome in some patients, it does not possess a narrow therapeutic index in the same way as vancomycin.

C (Valacyclovir) YOUR ANSWER

Valacyclovir is an antiviral medication that is typically taken orally and does not require IV administration. Its therapeutic index is not classified as narrow, and while renal function should be monitored in patients, it does not necessitate the same level of frequent laboratory testing as vancomycin.

D (Vancomycin) CORRECT

Vancomycin is an intravenous antibiotic that treats serious infections caused by gram-positive bacteria. Due to its narrow therapeutic index, it requires regular monitoring of serum levels to avoid nephrotoxicity and ototoxicity, ensuring that patients receive effective treatment without harm.

Conclusion

Vancomycin stands out as the only IV medication among the options that has a narrow therapeutic index, requiring careful laboratory monitoring to prevent adverse patient outcomes. In contrast, the other medications listed do not meet the criteria for intravenous use or do not require the same level of monitoring for safety and efficacy. This characteristic of vancomycin is crucial for effective clinical management and patient safety.

Which of the following is an IV medication that has a narrow therapeutic index and requires periodic laboratory monitoring to prevent patient harm?

Vancomycin is an IV medication that has a narrow therapeutic index and requires periodic laboratory monitoring to prevent patient harm.

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