Astepro Allergy is the first and only 24 hour, steroid-free nasal spray for allergy relief. While other allergy sprays may take hours to start working on the first day, Astepro full-prescription strength allergy medicine starts working in 30 minutes. This steroid-free allergy spray provides long-lasting allergy relief of indoor and outdoor nasal allergy symptoms, including nasal congestion, runny nose, sneezing, and itchy nose, for up to 24 hours. Astepro Allergy has flexible dosing, so it can be used once or twice daily for allergy relief. One spray contains 205.5 mcg of azelastine HCl.