Patent AT-E401332-T1: [Translated] NEW POLYMORPHS OF OLNZAPINE HYDROCHLORIDE

The present invention relates to new crystalline forms I, II and III of 2-methyl-4-(4-methylpiperazin-1-yl)-10H-thieno[2,3-b][1,5]-benzodiazepine hydrochloride, a process for the preparation thereof and pharmaceutical compositions containing the same. Said new polymorphic forms are useful as active ingredients for the treatment of psychotic conditions.