Medical Dictionary

loratadine

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

Medical Definition of loratadine

  1. :  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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