What should you do if someone with Acute Mountain Sickness shows no improvement?

Taking someone with Acute Mountain Sickness (AMS) back to sea level is the most appropriate course of action when they show no improvement. AMS can be a serious condition that occurs due to exposure to high altitudes, and if symptoms persist or worsen, it indicates that the individual is not acclimatizing effectively. The primary treatment for AMS is to lower the individual's altitude, as this helps to relieve symptoms by improving oxygen availability and reducing the effects of high altitude on the body.

Encouraging someone to continue ascending, providing more food and drink, or waiting for them to recover at the current location may exacerbate the situation, as these actions do not address the underlying issue of insufficient acclimatization. Continuing to ascend could lead to more severe forms of altitude sickness, while remaining in an elevated location without proper acclimatization could also prolong or worsen symptoms.