Dictionary of Allergies .. Azelastine

Azelastine nasal spray is commercially available as a 0.1% w/v solution and is recommended for twice-daily dosing. Increasing the azelastine concentration to 0.15% may be effective with once-daily dosing without increasing the incidence of adverse events.

References

van Bavel J, Howland WC, Amar NJ, Wheeler W, Sacks H. Efficacy and safety of azelastine 0.15% nasal spray administered once daily in subjects with seasonal allergic rhinitis. Allergy Asthma Proc. 2009 Sep-Oct;30(5):512-8. Epub 2009 Sep 10.