The 16-panel screening test detects recent use of the following drugs: Amphetamines, Marijuana, Cocaine, Opiates, Phencyclidine (PCP), Benzodiazepines, Barbiturates, Methadone, Propoxyphene, Oxycodone, Meperidine, Tramadol, ‘Fent Drug’, Sufentanil, Ketamine, Buprenorphine