Correct Answer: A

Rationale: The correct instruction for a client taking levodopa-carbidopa for Parkinson's disease is to increase fluid intake to prevent dehydration. Levodopa-carbidopa should be taken with food to reduce gastrointestinal upset and improve absorption. Taking medication at bedtime is not necessary to avoid daytime drowsiness, and it is essential to prevent dehydration due to the medication's side effects.

Correct Answer: B

Rationale: The correct action for the nurse to take when a client reports orange urine after taking rifampin is to inform the client that this change is not harmful. Rifampin is known to cause orange discoloration of urine, which is a harmless side effect. There is no need to notify the health care provider as this is an expected outcome. Monitoring creatinine levels or assessing for nephrotoxicity is unnecessary in this situation, as rifampin does not typically cause kidney damage.

Correct Answer: D

Rationale: The correct answer is to reinforce the instruction to brush and floss teeth daily. Phenytoin therapy can lead to gingival hyperplasia (gum disease), which can be prevented by maintaining good oral hygiene practices such as brushing and flossing daily.

Correct Answer: A

Rationale: The correct answer is to instruct the client to report any signs of heart failure when taking pioglitazone. Pioglitazone is known to potentially exacerbate heart failure, so it is crucial for clients to monitor and report any symptoms of heart failure promptly to their healthcare provider for appropriate management.

Correct Answer: A

Rationale: The correct answer is A: Dry mouth. Tiotropium, a commonly prescribed medication for COPD, can cause dry mouth as a side effect. While it may not be severe, clients should report it if it becomes bothersome. Blurred vision, nausea, and tachycardia are not typically associated with tiotropium use in the context of COPD.