CALPOL® Saline Nasal Spray is used for congestion and blocked noses caused by cold and flu; sinusitis; allergy including hayfever and post-nasal surgery. It helps to wash away built-up mucus, allowing your child to breathe more freely. It works by rinsing and restoring moisture to the nasal passages. As it is a simple, preservative-free, natural, non-medicated treatment, you can use it right from birth. CALPOL® Saline Nasal Spray (from birth) for congestion relief. Non medicine. Always read the label.