Flonase Non Drowsy Allergy Medicine for 24 Hour Allergy Relief relieves your worst allergy symptoms, including nasal congestion, all in an easy-to-use allergy nasal spray that outperforms the top non-drowsy allergy pill. Unlike over the counter allergy medication that only blocks one inflammatory substance in the body, this nasal congestion spray helps block six allergic substances for powerful multi-symptom relief. Whether you’re dealing with seasonal or year-round allergies, this allergy relief nasal spray helps you achieve more complete relief of allergy symptoms caused by pollen, mold, dust and pet dander.