Murine Irritation & Redness Relief is an eye drop solution. It is used to clear redness and soothe eyes which have been irritated by, for example, dusty atmospheres, wind, swimming, smoke, air pollutants, or close work such as reading and computer use. This medicine contains the active ingredient naphazoline hydrochloride which belongs to the group of medicines called local vasoconstrictors which act by narrowing the blood vessels in the eye, thereby reducing redness and swelling. Murine Irritation & Redness Relief is fast acting and has a long lasting action.