A 45-year-old patient with newly diagnosed pulmonary tuberculosis is starting anti-tuberculosis therapy. Which nursing intervention is the highest priority during the initial phase of treatment?

During initial TB therapy, monitoring for hepatotoxicity is the highest priority due to the risk of liver damage from first-line drugs. Other options are less critical: isolation is not needed for 6 months, kidney stones are not a primary concern, and monthly chest X-rays are not the highest priority.

Priority Nursing Intervention During Initial Phase of Anti-Tuberculosis Therapy

The correct answer is monitoring for signs of hepatotoxicity and educating about medication adherence. This intervention is the highest priority because drug-induced hepatotoxicity is the most significant and potentially life-threatening adverse event associated with first-line anti-tuberculosis drugs, and it frequently compromises treatment adherence during the critical initial phase.

Understanding the Clinical Priority

The initial phase of tuberculosis treatment involves a combination of first-line agents, most commonly isoniazid, rifampicin, pyrazinamide, and ethambutol. While these drugs are essential for achieving a microbiological cure, their administration carries a substantial risk of adverse drug reactions. The foundational review by He et al. identifies hepatotoxicity as a primary toxicity, mediated by oxidative stress and mitochondrial dysfunction, stemming mainly from isoniazid and rifampicin . This is not a minor or delayed complication; it can develop rapidly after treatment initiation, making vigilant assessment during the initial phase a nursing imperative.

The clinical significance of this monitoring is further reinforced by Ma'aruf et al., who highlight that adverse events like hepatotoxicity in drug-susceptible TB regimens directly compromise patient adherence and treatment outcomes . For a nurse, the dual role of monitoring and educating is critical. Detecting early signs such as jaundice, right upper quadrant pain, nausea, or unexplained fatigue allows for prompt intervention, which may prevent progression to severe liver injury. Simultaneously, educating the patient about these signs and the absolute necessity of adhering to the prescribed regimen—despite potential side effects—directly addresses the most common reason for treatment failure.

Rationale for Biochemical Surveillance

The priority of this nursing intervention is supported by evidence demonstrating the value of structured, periodic liver function monitoring. A study by Dana et al. specifically evaluated the importance of biochemical monitoring of liver function, performing tests on patients at baseline and periodically throughout the treatment course at 10 days, 3 months, and 6 months . This protocol underscores that the risk of hepatotoxicity is not static; it requires ongoing assessment, beginning in the initial phase. The study tracked predictive biomarkers including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and total bilirubin, all of which are standard components of a hepatic function panel . A nurse’s responsibility is to ensure that baseline levels are drawn before therapy begins and that follow-up labs are obtained as ordered, while correlating laboratory findings with the patient’s physical assessment.

Why Other Options Are Less Appropriate

- Option 2 (Implement strict contact isolation precautions for 6 months): This is not the highest priority. While airborne precautions are essential for patients with pulmonary TB, the duration is not a fixed 6-month period. Isolation is discontinued based on clinical criteria, including effective treatment for 2-3 weeks, clinical improvement, and three consecutive negative sputum smears. The initial nursing priority is managing the immediate, life-threatening risks of the medication itself.
- Option 3 (Encourage increased fluid intake to prevent kidney stones): This intervention is not a primary concern with standard first-line therapy. While hyperuricemia can occur as a side effect of pyrazinamide, routine encouragement of high fluid intake to prevent kidney stones is not a standard, high-priority nursing action for all patients starting TB treatment.
- Option 4 (Schedule monthly chest X-rays to monitor treatment progress): Radiographic monitoring is a tool for tracking disease response, but it is not the highest nursing priority during the initial phase. Treatment response is primarily monitored through sputum culture conversion. The immediate threat to the patient’s safety from hepatotoxic medications takes precedence over scheduling follow-up imaging.