What is Nasofed and what makes it different? Nasofed Anti Viral Nasal Spray is an advanced unique thixotropic nasal spray which when applied forms a moisturising protective film on the nasal mucosa surface. This film acts as a barrier protecting the inside of the nasal cavity against external factors. The ingredients of Nasofed prevent the adhesion of bacteria, and the penetration of viruses into the nasal mucosa, which are the main cause of nasal mucosa infections. This may help to reduce the need for pharmacological treatment in the case of viral nasal mucosa infection and may reduce the risk of secondary bacterial infection. Nasofed's unique thixotropic properties prevent the solution from running off the surface of the nose, giving a longer lasting protective film than conventional nasal sprays.