Calpol Soothe & Care Saline Nasal Drops Calpol Soothe & Care Saline Nasal Drops are an isotonic nasal saline solution that relieves nasal congestion due to cold & flu, sinusitis, allergies (including hayfever) & post-nasal surgery. They work by gently cleaning & moistening the mucous membranes of the nose. Calpol Soothe & Care Saline Nasal Drops are suitable for infants, babies & adults, including pregnant women, & are suitable for long-term use.