Correct Answer: B

Rationale: Diazepam, a CNS depressant, can lead to severe sedation when administered concurrently with an opioid like Fentanyl due to their additive central nervous system depressant effects. This interaction can potentiate respiratory depression and other CNS effects, increasing the risk of adverse outcomes.

Correct Answer: C

Rationale: Atenolol is a beta-blocker that can cause bradycardia as an adverse effect due to its mechanism of action in slowing down the heart rate. The nurse should instruct the client to monitor their pulse regularly and report any significant decreases to prevent complications related to bradycardia.

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: Diazepam, a CNS depressant, can interact with Fentanyl causing severe sedation when administered concurrently. This is due to the additive central nervous system depressant effects of both medications, which can lead to excessive sedation, respiratory depression, and other serious adverse effects. Therefore, healthcare professionals need to monitor clients closely for signs of excessive sedation or respiratory depression when administering these medications together.

Correct Answer: B

Rationale: When administering transdermal Methylphenidate, the patch should be left on for 9 hours per day to ensure optimal absorption and effectiveness of the medication. This duration helps maintain a consistent level of the drug in the child's system. Incorrect options: A) Applying one patch once per day is not the correct dosing regimen for transdermal Methylphenidate. C) The patch should not be applied to the child's waistline as it is recommended to apply it to a clean, dry area. D) Using the opened tray within 6 months is not directly related to the administration of transdermal Methylphenidate.