Patent ID: 8535261

Claim:
A system, comprising: means for detecting a concentration of at least one of a first pharmaceutically-acceptable taggant administered to a subject at least substantially concurrent with a therapeutic agent or a metabolic byproduct of the first pharmaceutically-acceptable taggant, the first pharmaceutically-acceptable taggant having a pharmacokinetic profile; means for detecting a concentration of at least one of a second pharmaceutically-acceptable taggant administered to the subject with the first pharmaceutically-acceptable taggant or a metabolic byproduct of the second pharmaceutically-acceptable taggant, the second pharmaceutically-acceptable taggant having a pharmacokinetic profile different from the pharmacokinetic profile of the first pharmaceutically-acceptable taggant; means for referencing the concentration of the at least one of the first pharmaceutically-acceptable taggant or the metabolic byproduct of the first pharmaceutically-acceptable taggant to the pharmacokinetic profile of the first pharmaceutically-acceptable taggant; means for referencing the concentration of the at least one of the second pharmaceutically-acceptable taggant or the metabolic byproduct of the second pharmaceutically-acceptable taggant to the pharmacokinetic profile of the second pharmaceutically-acceptable taggant; and means for approximating a time period lapsed between administering the therapeutic agent to the subject and detecting the concentration of the at least one of the second pharmaceutically-acceptable taggant or the metabolic byproduct of the second pharmaceutically-acceptable taggant.