Hypertonic saline refers to any saline solution with a concentration of sodium chloride (NaCl) higher than physiologic (0.9%). Commonly used preparations include 2%, 3%, 5%, 7%, and 23% NaCl.

Discover the best saline nasal sprays of 2025 for congestion relief, dry noses, and better sleep. Find drug-free solutions for everyday relief of sinus infections and seasonal allergies.