Editor,—In 1996, CS incapacitant spray was sanctioned for the use of police forces in England and Wales. As its use increases the demands on accident and emergency departments from individuals who have been exposed to this will also increase. Some of the points in Worthington and Nee's review¹ are worth clarifying.

The experimental work into the safety of CS was performed on pyrotechnically generated CS.^{2, 3} The spray used by the police produces a mist that contains …