Analysis of hair samples by Psychemedics Corporation provides a long-term detection window for substances of abuse, unlike urinalysis or blood testing. This method examines segments of hair, offering a historical record of drug use over several months. For example, a standard test using a 1.5-inch hair sample can detect drug use over approximately 90 days. The analysis identifies specific drug metabolites embedded within the hair shaft, offering a more definitive result compared to tests detecting only parent drugs. This approach minimizes the risk of false positives due to environmental exposure or contamination.
This form of drug testing plays a significant role in various sectors, including pre-employment screening, workplace safety, and legal proceedings. Its ability to reveal patterns of drug use over extended periods is invaluable for assessing an individual’s history with controlled substances. Developed in the late 1980s, this testing method has become a trusted tool due to its high degree of accuracy and resistance to common evasion tactics. Its widespread acceptance stems from its robust scientific foundation and established track record in court cases.
