For which of the following conditions is Methoxyflurane primarily used?

Methoxyflurane is primarily used for pain management, especially in pre-hospital and emergency settings. This inhalational analgesic is effective at providing rapid relief from pain, which is crucial in situations such as trauma or during procedures that might cause discomfort. Its ability to produce analgesia quickly makes it particularly useful in acute scenarios where other pain management strategies may not be feasible or would take longer to establish effect.

Injury-related pain, such as fractures or severe sprains, can be managed effectively with Methoxyflurane because it acts rapidly, allowing for immediate pain relief. This is especially beneficial to healthcare providers in managing patient comfort while transporting to higher levels of care or during painful manipulations or interventions.

The other conditions listed do not align with the primary use of Methoxyflurane. Severe anxiety might require anxiolytic medications, cardiac arrest management typically involves resuscitation efforts and medications like adrenaline, and respiratory distress calls for bronchodilators or steroids depending on the underlying cause. Thus, the unique properties of Methoxyflurane are best utilized in managing pain rather than for the other listed conditions.