What is the first step when administering first aid to someone exposed to CN or CS?

The first step when administering first aid to someone exposed to CN (tear gas) or CS (another type of tear gas) is to remove the individual from the contaminated area. This is crucial because the continued exposure to the irritants can exacerbate their symptoms and potentially lead to more severe health issues. By removing the person from the source of contamination, you help limit further exposure to the chemicals, which is essential for easing their discomfort and preventing complications.

Once they're in a safer environment, other measures can be taken, such as flushing affected tissues (which may involve rinsing eyes or skin), encouraging calmness, or seeking medical attention if necessary. However, ensuring that the person is out of the hazardous situation is the priority, enabling any additional first aid steps to be more effective.