What is the most appropriate immediate action for a patient presenting with severe hypertension and additional symptoms like headache and nausea?

In a situation involving a patient who presents with severe hypertension and associated symptoms such as headache and nausea, the immediate concern revolves around the potential for hypertensive emergencies. A hypertensive emergency is a medical condition that can lead to serious complications such as stroke, heart attack, or organ damage if not addressed quickly.

Preparing for immediate transport is crucial because these symptoms indicate that the patient may be in a life-threatening situation requiring prompt evaluation and treatment at a medical facility. In this context, swift transportation ensures that the patient can receive the appropriate interventions, such as intravenous medication or specialized care that may not be feasible on-site.

Other options may seem relevant but do not address the urgency of the situation adequately. Placing the patient in a supine position might provide comfort and improve blood flow but does not address the immediate need for advanced medical intervention. Summoning an ALS unit could be valuable, but if the situation necessitates rapid transport rather than waiting for additional resources to arrive, it can delay critical care. Administering oral glucose is inappropriate unless there are clear indications of hypoglycemia, which are not presented in this scenario.

Thus, prompt action towards transport is the most suitable choice to ensure the patient receives the necessary care without delay.