## Core Concept
Post-operative shivering is a common complication following anesthesia and surgery, leading to increased metabolic rate, discomfort, and potential cardiovascular strain. The underlying cause is often related to hypothermia or anesthetic-induced vasodilation. Effective treatment involves pharmacological and non-pharmacological measures to restore normothermia and alleviate symptoms.

## Why the Correct Answer is Right
The correct answer, , includes drugs that act on the central nervous system or affect thermoregulation. Specifically, **Pethidine (Meperidine)** is known for its effectiveness in treating post-operative shivering due to its action on kappa opioid receptors, which are involved in thermoregulation. It has been shown to be more effective than other opioids in this context.

## Why Each Wrong Option is Incorrect
* **Option A:** - While can have various effects on the body, it is not primarily known or specifically indicated for post-operative shivering.
* **Option B:** - This option does not directly relate to a commonly recognized treatment for post-operative shivering.
* **Option D:** - Similarly, this option does not represent a standard or widely accepted treatment for post-operative shivering.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **Pethidine (Meperidine)**, even at low doses, can effectively treat post-operative shivering. This is a high-yield fact for exams and clinical practice, as it provides a specific, evidence-based treatment option.

## Correct Answer Line
**Correct Answer: C. Pethidine (Meperidine).**