Sterimar Stop and Protect Allergy Response is made with 100 Percent natural seawater. With its unique nozzle design, the hypertonic formula rapidly neutralizes and protects against the particles such as allergens, dust and pollution, that are responsible for allergic reactions. The efficacy of this treatment has been scientifically proven. Our allergy response formula helps you breathe better, naturally. Free from drugs, steroids and preservatives, this product has no side effects and is safe for people who are pregnant and breastfeeding. It can even be used after nose surgery and injury. This product is not medicine based, but is a medical device. The propellent gas does not come in to contact with the solution, the specially designed tip allows gentle microdiffusion. The specific tip allows a gentle microdiffusion for safe administration of the solution in the nasal cavity, and is easy to use at any angle.