1. An apparatus for analyzing a drug and/or metabolite profile in a biological sample containing at least one drug and/or metabolite, comprising: an input unit for inputting the drugs and/or metabolites to be screened; a controlling unit for determining a parameter set for drugs and/or metabolites preparation and for mass spectrometry analysis depending on the input of the kind of drugs and/or metabolites to be screened; a treatment unit for preparing the drugs and/or metabolites to be screened depending on the determined parameter set; a mass spectrometer for performing mass spectrometry analysis on prepared drugs and/or metabolites depending on the parameter set; a database for storing results of analyzing and parameter sets for drug and/or metabolite preparation and for mass spectrometry analyses; and an evaluation unit for evaluating the results of mass spectrometry by use of reference results stored in the database to output an analysis of the drug and/or metabolite profile.