Which of the following is a correct medication order?

• A. Acetaminophen 325 mg PO for pain
• B. Acetaminophen 325-650 mg PO for pain q4-6h prn
• C. Acetaminophen 325-650 mg PO for pain as needed
• D. Acetaminophen 325 or 650 mg q4-6h prn

Answer: (B)

The main idea is that a correct medication order should clearly state the dose, the route, and how often to take it (with PRN). The best option provides all of this: acetaminophen 325-650 mg PO every 4-6 hours PRN for pain. It uses a dose range, specifies the route by mouth, and tells you to take it as needed with a clear frequency. This matches standard adult dosing: take a dose within 325-650 mg as needed every 4-6 hours while treating pain.

The other formats fall short because they either omit the dosing interval, use a vague or illogical phrasing, or present ambiguous choices like "325 or 650 mg" without a single defined dose for each administration.