The preferred antidote for paracetamol (acetaminophen) poisoning is –
**Core Concept**
The underlying principle being tested is the management of **paracetamol (acetaminophen) overdose**, which can cause severe **hepatic injury** due to the formation of toxic metabolites. **N-acetylcysteine** plays a crucial role in this context.
**Why the Correct Answer is Right**
**N-acetylcysteine** acts as a precursor to **glutathione**, which conjugates with the toxic metabolite of paracetamol, **N-acetyl-p-benzoquinone imine (NAPQI)**, thereby preventing **hepatocellular necrosis**. This mechanism highlights the importance of **glutathione** in detoxification processes.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified and not relevant to paracetamol overdose management.
**Option B:** Incorrect as it is not the preferred antidote.
**Option C:** Incorrect, not the standard treatment for paracetamol poisoning.
**Option D:** Incorrect, not typically used for this purpose.
**Clinical Pearl / High-Yield Fact**
Remember, **N-acetylcysteine** should be administered promptly in cases of paracetamol overdose to maximize its efficacy in preventing liver damage.
**Correct Answer:** D. N-acetylcysteine.