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loratadine

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noun lo·rat·a·dine \lə-ˈrat-ə-ˌdēn, -ˌdīn\

Medical Definition of loratadine

: a long-acting, nonsedating antihistamine drug C₂₂H₂₃ClN₂O₂ taken orally to relieve the symptoms of seasonal allergic rhinitis and chronic urticaria ◆Loratadine is an H₁ antagonist that binds competitively with histamine to H₁ receptors on cell membranes. It is marketed under the trademark Claritin.

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