Correct Answer: D

Rationale: The correct answer is D: BP of 70/50. When sildenafil (Viagra) is taken with nitroglycerin, it can cause severe hypotension that is unresponsive to treatment. The combination of these medications can lead to a dangerous drop in blood pressure. It is crucial to immediately report hypotension in this scenario. It is recommended to allow at least 24 hours to elapse between the last dose of sildenafil and nitroglycerin to prevent such adverse effects. The other vital signs and lab values may be abnormal but do not have the immediate life-threatening implications that severe hypotension does in this context.

Correct Answer: A

Rationale: High-protein meals and snacks are essential for children with cystic fibrosis due to their increased nutritional needs. Protein helps in maintaining muscle mass and overall health in individuals with cystic fibrosis, making it crucial to include in their diet.

Correct Answer: A

Rationale: The correct answer is A. Isotretinoin is highly teratogenic, which means it can cause birth defects. Therefore, it is crucial for patients, especially females of childbearing potential, to use effective forms of birth control to prevent pregnancy while taking this medication. This is a key component of patient teaching to ensure the safe use of isotretinoin.

Correct Answer: A

Rationale: Low-grade fever, malaise, and muscle aches are common reactions. Acetaminophen usually alleviates these problems. MMR is a live vaccine but it is attenuated or completely avirulent and does not cause measles in healthy children, only immunocompromised children.

Correct Answer: B

Rationale: The correct action for the nurse when preparing an adolescent for a lumbar puncture is to apply a topical analgesic cream to the site one hour before the procedure. This helps reduce pain experienced during the lumbar puncture, making the procedure more comfortable for the adolescent.