Approved for Epinastine HCl ophthalmic solution is an H 1 histamine receptor antagonist indicated for the prevention of itching associated with allergic conjunctivitis.. Epinastine is a topically active, direct H 1 -receptor antagonist and an inhibitor of the release of histamine from the mast cell. Epinastine is selective for the histamine H 1 -receptor and has… Side effects, costs,…
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