temporarily relieves nasal congestion due to: common cold; hay fever; upper respiratory allergies. temporarily relieves sinus congestion and pressure. shrinks swollen nasal membranes so you can breathe more freely. UNBLOCKS IN SECONDS*. LASTS 12 HRS. No 1 DOCTOR AND PHARMACIST^ RECOMMENDED NASAL SPRAY BRAND. *It unblocks your nose in seconds, providing 12 hours of nasal congestion relief without drowsiness, so you can breathe more freely all day or all night. ^Pharmacy Times survey.