Correct Answer: D

Rationale: Acetaminophen is not an opioid or NSAID. It is a pain reliever and fever reducer, but it works in a different way compared to opioids and NSAIDs. Unlike opioids, acetaminophen does not have the same risk of physical dependence or addiction. And unlike NSAIDs, acetaminophen does not have anti-inflammatory properties. It is often used for mild to moderate pain relief and as a fever reducer. Be cautious when taking acetaminophen, as high doses can be harmful to the liver.

Correct Answer: A

Rationale: Acyclovir can cause nephrotoxicity, so monitoring blood urea nitrogen (BUN) and creatinine levels is essential. Hypertension is not a common side effect of acyclovir. Intravenous acyclovir should be administered over at least 1 hour to prevent renal toxicity. Adequate fluid intake helps prevent crystalluria and nephrotoxicity.

Correct Answer: A

Rationale: Cleaning equipment between each enteral feeding is vital to prevent bacterial contamination, as residual formula can foster microbial growth, risking infections like gastroenteritis in a client already nutritionally compromised. While limiting hang time is important, evidence suggests a 4-hour maximum, not 8, to minimize spoilage-though this isn't the focus here. Refrigerating unused feeding preserves its integrity, preventing degradation or bacterial proliferation, which is critical for safety. Keeping the insertion site clean reduces infection risk at the tube entry, a common complication in enteral therapy. Cleaning equipment stands out as a proactive step the wife can take between feedings, directly impacting hygiene and client safety, whereas other points address storage or site care, which, while essential, are secondary to the immediate post-feeding action of equipment maintenance in this context.

Correct Answer: A

Rationale: Dalfampridine treats MS by blocking potassium channels in demyelinated axons, enhancing nerve conduction and improving walking ability. Exposed potassium channels in MS leak current, impairing signal propagation; dalfampridine's blockade restores function. Donepezil boosts acetylcholine for Alzheimer's. Riluzole reduces glutamate in ALS. Bromocriptine, a dopamine agonist, manages Parkinson's. Dalfampridine's unique potassium channel action directly addresses MS's neurological deficit, supported by clinical evidence, making it the correct agent here.

Correct Answer: A

Rationale: ACE inhibitors, such as enalapril and lisinopril, work by blocking the enzyme angiotensin-converting enzyme (ACE), which is responsible for converting angiotensin I into angiotensin II. By inhibiting this conversion, ACE inhibitors prevent the vasoconstrictor and aldosterone-stimulating effects of angiotensin II at the receptor sites. This leads to vasodilation, decreased blood pressure, and reduced aldosterone secretion. This mechanism of action makes ACE inhibitors an important class of medications for managing conditions such as hypertension, heart failure, and chronic kidney disease.