Psychemedics Corporation provides testing services for the detection of drugs of abuse through the analysis of hair samples in the United States and internationally. The company's testing methods utilize a patented technology that focuses on liquefying hair and releasing drugs trapped in the hair without destroying the drugs. It provides screening and confirmation by mass spectrometry using industry-accepted practices for cocaine, marijuana, PCP, and amphetamines; and opiates, including heroin, hydrocodone, hydromorphone, oxycodone, and codeine. The Company's tests provide quantitative information that can indicate the approximate amount of drug ingested, as well as historical data, which shows a pattern of individual drug use over a longer period of time. Psychemedics Corporation offers its services to employers for applicant and employee testing; physicians, treatment professionals, law enforcement agencies, school administrators, and parents concerned about their children's drug use; and Fortune 500 companies and small to mid-size corporations. The company was founded in 1985 and is headquartered in Acton, Massachusetts.