1-[2-(4,5,10,11-Tetrahydro-1H-dibenzo[a,d]cyclohepten-5-yl)ethyl]pyrrolidin e of the formula ##STR1## and its pharmaceutically acceptable acid addition salts, prepared through various intermediates, are described. The compounds have valuable histamine-H.sub.1 antagonistic properties and are suitable for the control or prevention of allergic reactions,such as, urticaria, hay fever, anaphylaxis and over-sensitivity to medicaments.
描述了一种公式为##STR1##的化合物及其药学上可接受的酸加盐,该化合物通过各种中间体制备。这些化合物具有有价值的
组胺-H.sub.1拮抗性能,适用于控制或预防过敏反应,如荨麻疹、花粉热、过敏性休克和对药物过敏。