Used as a nasal decongestant in over-the-counter cold and allergy medications due to its vasoconstrictive properties. It works by narrowing blood vessels in the nasal passages, reducing swelling and congestion. Fenoxazoline is commonly found in nasal sprays and drops, providing temporary relief from stuffy nose caused by colds, sinusitis, or hay fever. Its action is similar to other sympathomimetic agents, but it is selected for formulations where localized effect with minimal systemic absorption is desired.