Correct Answer: B

Rationale: The correct answer is B: Levodopa. Levodopa is associated with the on-off phenomenon and wearing-off effect in Parkinson's disease treatment due to fluctuations in its effectiveness over time. The on-off phenomenon refers to sudden and unpredictable changes in motor function, while wearing-off effect occurs when the medication's effects diminish before the next dose. Amantadine (A) is not typically associated with these phenomena. Benztropine (C) is an anticholinergic used for tremors and rigidity. Pramixole (D) is a dopamine agonist that can cause dyskinesias but is not primarily linked to on-off or wearing-off effects.

Correct Answer: B

Rationale: The correct answer is B: Because these clients may experience difficulty voiding. Antihistamines can worsen urinary symptoms in men with prostatic hypertrophy by causing urinary retention. This is due to the anticholinergic effects of antihistamines, which can lead to decreased bladder contraction and difficulty in voiding. Increased drowsiness (choice A) is a common side effect of antihistamines but is not specific to older men with prostatic hypertrophy. Choice C, greater risk of cardiac arrest, is not directly related to the use of antihistamines in older men with prostatic hypertrophy. Choice D, lower autoimmune response in clients with AIDS, is unrelated to the use of antihistamines in older men with prostatic hypertrophy.

Correct Answer: B

Rationale: Step 1: Keeping the neck in midline helps prevent compression of the lymphatic vessels in the neck, reducing the risk of impaired skin integrity in Hodgkin's disease. Step 2: This position also helps maintain proper blood flow and lymphatic drainage in the neck area. Step 3: Trimming nails short, using mild soap, and supporting bony prominences are not directly related to preventing impaired skin integrity in Hodgkin's disease. Summary: Choice B is correct as it directly addresses the specific risk factor of impaired skin integrity in Hodgkin's disease, while the other choices are not as relevant to this particular concern.

Correct Answer: C

Rationale: The correct answer is C: Use the smallest needle possible for injections. In a client with thrombocytopenia (low platelet count), there is an increased risk of bleeding and bruising. Using the smallest needle possible for injections reduces the risk of causing injury to blood vessels and tissues, minimizing bleeding complications. Limiting visits by family members (choice A) is not directly related to protecting the client's safety. Encouraging wheelchair use (choice B) is not necessary unless indicated for mobility reasons. Maintaining accurate fluid intake and output records (choice D) is important for overall client care but does not directly address the risk of bleeding in thrombocytopenia.

Correct Answer: A

Rationale: The correct answer is A: Bacterial meningitis. Bacterial meningitis is the most significant form due to its potential severity and rapid progression, requiring urgent medical intervention with antibiotics. Bacterial meningitis can lead to serious complications such as brain damage or death if left untreated. Septic meningitis (choice B) refers to meningitis caused by a systemic infection spreading to the meninges. Aseptic meningitis (choice C) is typically viral or non-bacterial in origin, usually milder than bacterial meningitis. Viral meningitis (choice D) is less severe than bacterial meningitis and often resolves on its own without specific treatment.