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No, the products are NOT AB rated and therefore are not interchangeable. ASTEPRO 0.15% contains 205.5 mcg of azelastine HCI in each 0.137 mL spray. ASTEPRO and ASTELIN contain 137 mcg of azelastine HCI in each 0.137 mL spray. Furthermore, the products have different indications and dosing regimens.
