Prevalin allergy nasal spray is a medical device that contains a mixture of inactive ingredients, including bentonite (a form of purified clay), xanthan gum, glycerol stearate and sesame seed oil. These are not absorbed into the body from the nose. The spray works by creating a barrier on the nasal lining.

Relieves allergy effectively
Requires 3 minutes to work
Ideal to treat hay fever, dust mite and pet allergies
Works best on sneezing, runny nose, nasal congestion, watery eyes and itching