This disclosure relates to new compounds that may be used to modulate a histamine receptor in an individual. Novel compounds are described, including new bridged heterocyclic [4,3-b]indole compounds. Pharmaceutical compositions are also provided. Pharmaceutical compositions comprising the compounds are also provided, as are methods of using the compounds in a variety of therapeutic applications, including the treatment of a cognitive disorder, psychotic disorder, neurotransmitter-mediated disorder and/or a neuronal disorder.本案係關於可用以調節個體之組織胺受體之新穎化合物。所描述的新穎化合物包括新穎橋聯雜環[4,3-b]吲哚化合物。本案亦提供醫藥組合物,亦提供包含該等化合物之醫藥組合物,亦提供該等化合物在包括治療認知病症、精神病、神經傳遞素介導之病症及/或神經元病症之多種治療應用中的使用方法。