Otrivin Oxy Fast Relief Adult Nasal Spray can be used for temporary relief of nasal congestion caused by allergies, cold, sinusitis, or hay fever. It contains Oxymetazoline hydrochloride, which narrows the blood vessels in the nasal passages to reduce swelling and make breathing easier. However, it should be used only for 3–5 days, as prolonged use may cause rebound congestion. People with asthma, high blood pressure, heart disease, or thyroid problems should consult a doctor before using it, and it is not meant for the treatment of asthma itself.