Based on the ancient Minor Blue Dragon formula from Traditional Chinese Medicine, AllerEze contains a complex of herbal materials that have been used in traditional Chinese practices to balance the immune system's reaction to environmental agents and support the resilience of the nasal sinuses.* Karuna's AllerEze contains no ephedrine and benefits from the addition of other herbs that enhance this uniquely effective formulation. AllerEze contains herbal extract concentrates that provide four times the activity of the raw, unconcentrated herb, requiring fewer capsules.