Correct Answer: A

Rationale: The correct answer is A. Clients with pernicious anemia or other causes of vitamin B12 deficiency may need to take cyanocobalamin for life to prevent deficiency. It is a lifelong treatment in many cases to maintain adequate B12 levels.

Correct Answer: B

Rationale: The correct answer is to monitor Prothrombin time (PT) when a patient is on warfarin therapy. Warfarin affects blood clotting, and PT is used to assess the therapeutic effect of this medication.

Correct Answer: B

Rationale: The correct answer is B. Diarrhea can indicate the development of a suprainfection, which can be serious. Therefore, it is essential for the client to notify the healthcare provider if they experience diarrhea while taking Tetracycline to treat a GI infection caused by Helicobacter pylori.

Correct Answer: C

Rationale: It is essential to instruct the client to apply the Nitroglycerin patch to a different site each time to prevent skin irritation and ensure consistent absorption of the medication. Rotating application sites helps maintain the effectiveness of the treatment and reduces the risk of skin reactions.

Correct Answer: B

Rationale: The correct statement to include in discharge teaching about Nevirapine, an NNRTI, is to advise the client to avoid alcohol while taking this medication. This is important because alcohol can interact with Nevirapine and lead to potential adverse effects or decreased effectiveness.