Determination of drugs of abuse in hair

 “Hair has been focused on for its usability as an alternative biological specimen to blood and urine for determining drugs of abuse in fields ... because hair can be used to elucidate the long intake history of drugs of abuse compared with blood and urine.” Blood and urine have long been the most used biological samples for the analysis of drugs of abuse. The incorporation of drugs into these fluids is well known, and their analysis and interpretation of results have become routine in toxicology laboratories. Nevertheless, in recent decades alternative samples have begun to be used because they offer...