Correct Answer: A

Rationale: The correct answer is A: Increased risk of infection. Infliximab is known to increase the risk of infection due to its immunosuppressive effects. It is crucial for the nurse to monitor for signs of infection in the client receiving infliximab to promptly address any potential complications and ensure the client's safety and well-being.

Correct Answer: B

Rationale: Hydrochlorothiazide is a diuretic that can lead to potassium loss, resulting in hypokalemia. Monitoring for hypokalemia is essential because it can cause various complications such as cardiac dysrhythmias. Therefore, the practical nurse should closely watch for signs and symptoms of low potassium levels in clients taking hydrochlorothiazide.

Correct Answer: B

Rationale: Bulk-forming laxatives are recommended to prevent constipation because they are safe and considered the most natural option. These laxatives work by absorbing liquid in the intestines, forming a bulky, soft stool that is easier to pass, thereby helping to prevent constipation.

Correct Answer: C

Rationale: When a client with chronic heart failure is prescribed furosemide, a diuretic, the nurse should be vigilant for potential adverse effects. Furosemide can lead to excessive fluid loss, resulting in dehydration. Dehydration is a significant concern as it can exacerbate heart failure symptoms. Additionally, furosemide can cause electrolyte imbalances, particularly affecting potassium and sodium levels. Monitoring for signs of dehydration and electrolyte disturbances is crucial to prevent complications and ensure the client's safety and well-being.

Correct Answer: A

Rationale: The most important nursing intervention before administering ampicillin to a client with a urinary tract infection is to obtain a clean-catch urine specimen. This specimen is crucial for determining the causative organism and evaluating the effectiveness of pharmacological therapy. It should be collected before starting treatment with an anti-infective agent to ensure accurate diagnosis and appropriate management of the infection.