How can divers mitigate the effects of nitrogen narcosis?

Ascending to shallower depths is the most effective way for divers to mitigate the effects of nitrogen narcosis. This phenomenon occurs because at greater depths, the partial pressure of nitrogen increases, which enhances its narcotic effects. If divers begin to feel the symptoms of narcosis—such as impaired judgment, reduced coordination, or a feeling of euphoria—the best course of action is to ascend. By moving to shallower water where the pressure decreases, the partial pressure of nitrogen in the body is reduced, leading to a decrease in narcosis symptoms.

While increasing breathing rate or changing gas mixtures can be helpful in different contexts (such as reducing carbon dioxide buildup or addressing specific physiological needs), they do not directly alleviate the immediate effects of nitrogen narcosis. In fact, descending further could exacerbate the condition since the narcotic effects are linked to depth. Thus, the most straightforward and effective response to symptoms is to ascend to a shallower depth.