Ethyl 4-(8-chloro-5,6-dihydro-11 H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidene carboxylate polymorph

Abstract

A polymorph form 2 of ethyl 4(8-chloro-5,6,-dihydro-11H- benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidene carboxylate (hereinafter “loratadine”) represented by the formula Pharmaceutical composition containing the polymorph form 2, and methods of using the polymorph form 2 to treat allergic reactions in mammals such as man are disclosed.

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