Acetaminophen dosing: maximum daily dose.

• A. 2,000 mg/day
• B. 4,000 mg/day
• C. 6,000 mg/day
• D. 3,500 mg/day

Answer: (D)

The main idea here is safety with acetaminophen dosing, specifically preventing liver injury by limiting total daily exposure when a patient may be using more than one acetaminophen-containing product. The best choice reflects a conservative daily ceiling that accounts for all sources of acetaminophen a patient could be taking, not just a single medication. By setting the upper limit somewhat below the absolute maximum allowed for a healthy person, this approach reduces the risk of inadvertent overdose from combining multiple OTC or prescription products.

Acetaminophen is processed in the liver, and excess amounts can generate a toxic metabolite that depletes protective glutathione, leading to hepatotoxicity. Staying within a conservative daily limit helps avoid reaching that危険 level, even if someone uses more than one drug that contains acetaminophen. If someone does exceed the safe ceiling, there is an antidote that can prevent or mitigate liver injury if administered promptly.

The other options would either overly restrict pain relief or fail to provide adequate protection against unintentional accumulation from multiple products.