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Loratadine, 4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester, is an antihistamine drug with long-acting effects and has limited selectivity for peripheral H1 receptors. It is widely used for the prevention of allergic diseases such as rhinitis chronic urticaria, and asthma. This chapter discusses, by a critical extensive review of the literature, the description of loratadine in terms of its names, formulae, elemental composition, appearance, methods of preparation. The p
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