I have used this now for several years and wouldn't think about changing. My husband has finally switched over from using an over-the-counter product and is very pleased, too. bioAllers Sinus and Allergy Relief is designed using homeopathic principles and may help provide temporary general relief of allergy symptoms due to respiratory allergens like pollens, animals, molds, yeast or dust. Homeopathic theory is that symptom relief is attained through stimulation of the natural healing response. This formula is manufactured to provide precise levels of homeopathic ingredients. When it comes to quality, our bar is set high. Manufactured to pharmaceutical standards in the USA, our Sinus and Allergy Nasal Spray solution is formulated to be non-drowsy. bioAllers is one of the top homeopathic allergy brands in the United States. Each product is carefully formulated to have two sets of ingredients. One set is for symptom relief and the other set exclusively contains allersodes which are homeopathically prepared allergens that directly target the cause of the allergy. Our Manufacturer To ensure you get only the best supplements with the best ingredients, our manufacturer, Nutraceutical, requires a certificate of analysis from each supplier to guarantee product quality. But they dont stop there. Upon receiving any ingredient, they test in a state-of-the-art laboratory before any material is used in our formulas. Nutraceuticals lab verification procedure includes testing for purity, identity, and potency. Rest assured, every batch meets the highest-quality standard because you deserve the best. Trust bioAllers to deliver the highest-quality allergy symptom relief order Sinus and Allergy Nasal Spray today! *Claims based on traditional homeopathic practice, not accepted medical evidence. Not FDA evaluated.