**Core Concept**
Malignant Hyperthermia (MH) is a life-threatening medical emergency that can occur in susceptible individuals exposed to certain volatile anesthetics and depolarizing muscle relaxants. It is characterized by a hypermetabolic state, leading to increased heat production, acidosis, and muscle rigidity.

**Why the Correct Answer is Right**
The first step in managing MH is to immediately discontinue the suspected triggering agent, in this case, the inhalational anesthetic. This is crucial to prevent further exacerbation of the condition. The patient should be rapidly cooled using ice packs or a cooling blanket to reduce the hypermetabolic state. Additionally, administration of dantrolene, a specific antidote for MH, is essential to prevent further muscle rigidity and cardiac complications.

**Why Each Wrong Option is Incorrect**
**Option A:** Administering more anesthetic would only worsen the condition and increase the risk of cardiac arrest.
**Option B:** Administering a benzodiazepine may help with anxiety but would not address the underlying cause of MH.
**Option C:** Administering a non-depolarizing muscle relaxant may worsen muscle rigidity and increase the risk of respiratory compromise.

**Clinical Pearl / High-Yield Fact**
In patients with MH, the temperature can rise to as high as 42°C (107.6°F), leading to severe cardiac complications and multi-organ failure if not promptly treated.

**Correct Answer: D. Administer dantrolene 2.5 mg/kg IV and rapidly cool the patient**