Correct Answer: D

Rationale: When educating a client about Bisacodyl suppositories, it is important to include information about the common side effects. Rectal burning is a frequent side effect that can occur after using Bisacodyl suppositories, so the client should be informed to expect this discomfort. The onset of action for Bisacodyl suppositories is typically within 15 to 60 minutes, so the client should expect results relatively quickly, not in 6 to 12 hours. There is no specific instruction to insert the suppository after breakfast, and keeping the suppository in the refrigerator is not necessary.

Correct Answer: B

Rationale: When a client is receiving Gentamicin, the nurse should monitor serum creatinine levels to assess for nephrotoxicity. Gentamicin is known to potentially cause nephrotoxicity, leading to impaired kidney function. Monitoring serum creatinine levels helps in early detection of any kidney damage or dysfunction.

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: C

Rationale: Omeprazole should be administered in the morning on an empty stomach to maximize its effectiveness. This timing is important as omeprazole works best when taken before a meal to inhibit acid production by the stomach. Taking it on an empty stomach in the morning allows the medication to be absorbed efficiently and provides optimal therapeutic effects throughout the day.

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.