Once-daily Flonase Allergy Relief Nasal Spray is the first and only nasal spray proven to offer 24-hour relief of both nose and eye-related allergy symptoms. Flonase helps block 6 allergic substances, not just 1. Flonase is both no addictive and no drowsy. Full prescription strength Flonase Allergy Relief is available without a prescription; there's nothing standing between you and effective allergy relief. It doesn't matter if you suffer seasonally or all year long with Flonase, you are greater than your allergies.