Washes away unwanted pollens, dust, animal fur & other irritants in patients w/ hay fever or allergies. Removes excess mucus & bacteria from the nose & sinus cavities in patients w/ colds, flu & sinusitis; helps relieve facial pressure & discomfort often felt w/ sinusitis. Washes away mucus & dry blood from the nose & sinuses post-op. Helps relieve nasal & sinus congestion in CPAP (continuous +ve airway pressure) users. Helps clear mucus & improves effectiveness of other medicated nasal sprays.