A nurse is preparing to administer 2.5 mL of medication intramuscularly to an adult client. Which of the following is the safest site for the nurse to use?

A. Alanine aminotransferase (ALT): ALT is an enzyme found primarily in the liver, and elevated levels indicate hepatocellular injury. Acetaminophen overdose can cause severe liver toxicity, so a rise in ALT reflects liver damage and is a key laboratory marker to monitor in this situation.

B. Thyroxine (T4): Thyroxine is a thyroid hormone and is unrelated to liver injury or acetaminophen toxicity. Changes in T4 levels do not provide information about organ damage resulting from an overdose.

C. Serum amylase: Serum amylase is an enzyme associated with pancreatic function. While elevated amylase indicates pancreatitis, it is not typically affected by acetaminophen overdose and does not reflect hepatotoxicity.

D. Creatinine kinase (CK): CK is an enzyme released from muscle tissue during injury or breakdown. While important in assessing muscle damage or rhabdomyolysis, it does not indicate liver damage from acetaminophen toxicity.

• Administer regular insulin: The client’s glucose increased from 120 mg/dL to 195 mg/dL, which is a common stress response in infection. Short-acting insulin may be anticipated to manage hyperglycemia during acute illness. Controlled glucose levels help reduce infection complications and support healing in clients with type 2 diabetes.

• Place client on 1,500 mL fluid restriction: The client shows signs of dehydration risk, including thirst, fever, and increased BUN at 25 mg/dL. With infection and fluid losses from fever, a restriction would worsen hydration status. The client is already receiving IV fluids to maintain volume and support perfusion, so limiting fluids would be harmful.

• Increase supplemental oxygen to ≥95%: The client’s oxygen saturation is 89% on 2 L/min, which is below target and indicates worsening oxygenation. Increasing oxygen flow is appropriate to improve gas exchange in pneumonia and COPD exacerbation. Maintaining higher saturations prevents respiratory fatigue and tissue hypoxia.

• Obtain sputum culture: The client has fever, productive cough with yellow sputum, and chest X-ray-confirmed pneumonia. A sputum culture helps identify the causative organism and guide antibiotic therapy. Culture results can optimize treatment effectiveness and prevent antibiotic resistance.