To clear blocked, stuffy noses. Rhinodoron is a natural nasal spray that comes as a neat little medical device to help clear a blocked, stuffy nose when you have a cold or are suffering from an allergy such as Hayfever. Suitable for babies from the age of 3 months. Suitable for vegans. To clear blocked, stuffy noses. Rhinodoron is a natural nasal spray that comes as a neat little medical device to help clear a blocked, stuffy nose when you have a cold or are suffering from an allergy such as Hayfever. Suitable for babies from the age of 3 months. Suitable for vegans.