title: Testing for drugs--advantages and disadvantages.
mesh_terms: D002849:Chromatography, Gas; D002854:Chromatography, Paper; D002855:Chromatography, Thin Layer; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D008487:Medical History Taking; D009021:Morphine Dependence / Q000175:diagnosis; D009269:Nalorphine; D010640:Phenothiazines / Q000652:urine; D019966:Substance-Related Disorders
chemical_list: D010640:Phenothiazines; D009269:Nalorphine