Answer
The fluticasone propionate component of azelastine hydrochloride/fluticasone propionate nasal spray binds with very high affinity to the glucocorticoid receptor to produce its potent anti-inflammatory action.
Sources for this answer
- Flomister 137 micrograms / 50 micrograms per actuation nasal spray, suspensionStrides Pharma UK Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 1Document updated
Sources checked