The present invention relates to a sustained-release composition containing 2,3,4,5-tetrahydro-2,8-dimethyl-5-2-ethyl-1H-pyrido4,3-bindole or a pharmaceutically acceptable salt thereof as an active ingredient, preparation thereof and the compound. A method and a computer program product are also provided. The head has a first set of receiving holes and a second set of receiving holes which are substantially similar to the first set and are offset from the first set of receiving holes. The writer transmits a registration code to the portable key device and generates intermediate data with the first transformation equation of the writer.