The present invention relates to pharmaceutically acceptable complex formulae comprising complexes of Abiraterone acetate and pharmaceutically acceptable excipients, process for the preparation thereof and pharmaceutical compositions containing them. The complex formula of the present invention have improved physicochemical properties which results in reduced food effect which allows significant dose reduction and the abandoning of the requirement of taking the drug on an empty stomach.本發明關於藥用可接受的包含阿比特龍乙酸錯合物與藥用可接受的賦形劑之錯合物製劑,製備其的方法以及包含其的藥用成份。本發明之錯合物製劑增進的物化性質降低了食物效應而可明顯降低使用劑量,且不需在空腹時服藥。