sudafed mucus relief nasal spray targets nasal mucus directly & is clinically proven to start relieving congestion within minutes. with one application it can help you breathe easy for up to 10 hours & because you only need to take it 2-3 times a day it wonæt interrupt your busy schedule. please note: continuous product use for over 7 days is not recommended., targets nasal mucus directly works in minutes lasts up to 10 hours