Final answer:
The nurse should prioritize gathering supplies for endotracheal intubation when caring for an unresponsive client with alcohol toxicity.
Step-by-step explanation:
When caring for a client with alcohol toxicity who is unresponsive, the nurse should prioritize gathering supplies for endotracheal intubation. This is important because the client's unresponsiveness may indicate compromised airway and the need for artificial ventilation. Administering a beta blocker intravenously is not an appropriate intervention for alcohol toxicity.
Beta blockers are typically used to treat conditions such as hypertension and cardiac arrhythmias, which are not directly related to alcohol toxicity. Positioning the client in a low Fowler's position may not be necessary in this situation. The priority is to ensure the airway is protected and supported through intubation.