Drug having analgesic and moderate anti-inflammatory property:
**Core Concept**
The question is testing the student's knowledge of non-steroidal anti-inflammatory drugs (NSAIDs) with their analgesic and anti-inflammatory properties. NSAIDs work by inhibiting the enzyme cyclooxygenase (COX), which is involved in the synthesis of prostaglandins, mediators of pain and inflammation.
**Why the Correct Answer is Right**
The correct answer is likely to be a drug that selectively inhibits COX-2, an enzyme that is primarily involved in the production of prostaglandins in the inflammatory process. This mechanism of action results in analgesia and moderate anti-inflammatory effects, as well as reduced gastrointestinal side effects. An example of such a drug is celecoxib, which is a COX-2 inhibitor.
**Why Each Wrong Option is Incorrect**
* **Option A:** Ibuprofen is a non-selective COX inhibitor, which means it inhibits both COX-1 and COX-2 enzymes. While it has analgesic and anti-inflammatory properties, its non-selective inhibition of COX-1 can lead to gastrointestinal side effects.
* **Option B:** Acetaminophen is primarily an analgesic and antipyretic, with minimal anti-inflammatory effects. It works by inhibiting the synthesis of prostaglandins in the central nervous system, but not in the periphery.
* **Option C:** Aspirin is a non-selective COX inhibitor, similar to ibuprofen. It has analgesic and anti-inflammatory properties, but its non-selective inhibition of COX-1 can lead to gastrointestinal side effects.
**Clinical Pearl / High-Yield Fact**
When choosing an NSAID, it's essential to consider the patient's risk of gastrointestinal bleeding and the need for anti-inflammatory effects. Selective COX-2 inhibitors like celecoxib may be a better option for patients with a history of gastrointestinal issues.
**Correct Answer: C. Aspirin**