lo·​rat·​a·​dine lə-ˈrat-ə-ˌdēn How to pronounce loratadine (audio) -ˌdīn How to pronounce loratadine (audio)
: a long-acting, nonsedating antihistamine drug C22H23ClN2O2 taken orally to relieve the symptoms of seasonal allergic rhinitis and chronic urticaria

Note: 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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Cite this Entry

“Loratadine.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/loratadine. Accessed 1 Dec. 2023.

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