Correct Answer: C

Rationale: The correct instruction for a client prescribed Ranitidine is to take the medication at bedtime. Ranitidine is best taken at night to reduce nighttime stomach acid production, providing optimal relief for conditions like gastroesophageal reflux disease (GERD) and ulcers.

Correct Answer: D

Rationale: In severe Aspirin toxicity, respiratory depression can occur due to increasing respiratory acidosis. Aspirin toxicity leads to metabolic acidosis, stimulating the respiratory center in the brain to increase the respiratory rate initially. However, as the toxicity worsens, respiratory muscle fatigue and depression can occur, resulting in respiratory depression. This can lead to hypoxia, respiratory failure, and ultimately, respiratory arrest.

Correct Answer: B

Rationale: Isosorbide, an organic nitrate used for angina, is contraindicated with sildenafil due to the risk of fatal hypotension. Concurrent use of these medications can lead to severe hypotension. Patients are advised to avoid taking nitrate medications for 24 hours after using isosorbide to prevent this dangerous interaction.

Correct Answer: B

Rationale: The client's serum calcium level is below the expected reference range, indicating hypocalcemia. Calcium carbonate, an oral form of calcium, is used to increase serum calcium levels to the expected range in cases of hypocalcemia. It helps correct the deficiency by supplementing calcium in the body.

Correct Answer: B

Rationale: Tremors are a possible adverse effect of Albuterol due to its stimulation of beta2 receptors in skeletal muscles. It is important for the healthcare provider to educate the caregiver about potential side effects to enhance safety and monitoring of the adolescent client.