The health of the respiratory system is essential for maintaining the quality of daily life. The proper functioning of the nasal cavity contributes to the improvement of smell, breathing, and overall well-being. However, many people experience nasal congestion, allergic reactions, or even respiratory illnesses that make normal living difficult. In such cases, the use of nasal sprays can often help alleviate symptoms. Various types of nasal sprays are available, but hypertonic and isotonic solutions are the most common. What is an isotonic nasal spray? An isotonic nasal spray is a saline solution that has a salt concentration matching our body’s natural saline concentration, typically around 0.9% NaCl (sodium chloride). This…