The present invention relates to toluenesulfonic acid addition salt crystals of 4-((6bR,10aS)-3-Methyl-2,3,6b,9,10,10a-Hexahydro-1H-Pyrido[3',4':4,5]Pyrrolo[1,2,3-De]Quinoxalin-8(7H)-yl)-1-(4-Fluorophenyl)-1-Butanone, the method of making and using such crystals.