Correct Answer: B

Rationale: Magnesium and calcium can accumulate in patients with renal failure, leading to toxicity.

Correct Answer: C

Rationale: The correct response is to perform a pain assessment using a numeric scale. Ketorolac is an NSAID prescribed for pain relief. Monitoring pain levels is crucial to evaluate the therapeutic effectiveness of the medication. Pain assessment helps determine if the medication is providing adequate pain relief, indicating that therapeutic levels have been achieved.

Correct Answer: A

Rationale: Antidepressant medications typically require 1 to 4 weeks to reach their full therapeutic effect. It is crucial to educate the family that during the initial week of treatment, the child may experience heightened anxiety. Therefore, it is important to wait for the medication to take its full course before assessing its effectiveness.

Correct Answer: B

Rationale: The correct answer is B: History of an egg allergy. The influenza vaccine may contain a small amount of egg protein. According to the CDC, individuals with a severe allergy to any component of the vaccine, including egg protein, should not receive the influenza vaccine. Therefore, if the client has a history of an allergy to eggs, the practical nurse should not administer the vaccine and consult with the charge nurse for further guidance, as it is a contraindication. The other conditions listed do not require consultation before administering the influenza vaccine.

Correct Answer: D

Rationale: Epigastric pain unrelieved by antacids is a concerning symptom that may indicate a more serious underlying condition such as a perforated ulcer. This symptom requires immediate medical attention to prevent further complications.