This 12-panel hair follicle drug test is testing for: Amphetamines (including Methamphetamines), Barbiturates, Benzodiazepines, Cocaine, Marijuana, Meperidine, Methadone, Opiates (including Heroin, Codeine, Morphine, Hydrocodone, Hydromorphone), Oxycodone, Phencyclidine, Propoxyphene, Tramadol. The 12 Panel Hair Follicle Test is only available at specific LabCorp collection facilities and specimens can only be taken from the head.