n.
an antihistamine drug used to treat hay fever and urticaria (nettle rash). It is administered by mouth. Possible side-effects include dry mouth, blurred vision, and urinary retention. Trade name: Semprex.
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ac·ri·vas·tine (ak″rĭ-vasґtēn) an antihistamine (H1 receptor antagonist) used in treatment of seasonal allergic rhinitis; administered orally.Medical dictionary. 2011.