Drugs of Abuse Testing Assays
6-Acetylmorphine
AB-PINACA
- ARK AB-PINACA Assay
- Immunalysis Synthetic Cannabinoids-3 HEIA
Amphetamines
- Immunalysis Amphetamines HEIA
Barbiturates
- Immunalysis Barbiturates HEIA
Benzodiazepines
Benzoylecgonine (Cocaine Metab.)
- Immunalysis Benzoylecgonine HEIA
Buprenorphine
Cannabinoids
- Immunalysis Cannabinoids HEIA
Carisoprodol
- Immunalysis Carisoprodol HEIA
EDDP
- ARK EDDP Assay
- Immunalysis EDDP Specific HEIA
Ethylglucuronide (EtG)
Fentanyl
JWH-018
- ARK UR144/JWH-018 Assay
- Immunalysis Synthetic Cannabinoids-1 HEIA
Ketamine
Meperidine
- ARK Meperidine Assay
- Immunalysis Meperidine HEIA
Methamphetamine
- Immunalysis Methamphetamine HEIA
Methylphenidate-Metabolite
Opiates
- Immunalysis Opiates HEIA
Oxycodone
- Immunalysis Oxycodone HEIA
Phencyclidine (PCP)
- Immunalysis Phencyclidine HEIA
Pregabalin
Tapentadol
- Immunalysis Tapentadol HEIA
Tramadol
- ARK Diagnostics Tramadol Assay
- Immunalysis Tramadol HEIA
UR-144 / XLR-11
- ARK UR144/JWH-018 Assay
- Immunalysis Synthetic Cannabinoids-2 HEIA
Zolpidem
- Immunalysis Zolpidem HEIA
ARK Fentanyl II Assay

The ARK™ Fentanyl II Assay is a homogeneous enzyme immunoassay for the qualitative detection of fentanyl in human urine, at a cut-off concentration of 1.0 ng/mL.
Assay Characteristics
- Highly sensitive and specific detection of fentanyl in human urine
- Excellent cross-reactivity to norfentanyl (15 ng/mL)
- No significant unwanted cross-reactivities
- Cut-off at 1.0 ng/mL
- Liquid stable, ready-to-use reagents, calibrators, and controls
- Application protocols for most clinical chemistry analyzers
Background
Fentanyl is a synthetic, morphine-like analgesic from the opioid group and is 50 to 100 times stronger than morphine. It is used in patients with chronic and post-operative pain and as a palliative treatment for cancer patients. Fentanyl is available in various dosage forms: as an injection (intravenous or intramuscular), as a transdermal patch, or orally (as a transmucosal lozenge).
Despite its high potency, fentanyl only has a short duration of action. Due to its pronounced euphoric effects, fentanyl is often abused. Patients receiving fentanyl should, therefore, be monitored regularly for signs of misuse, abuse, or dependence. Overdoses can lead to severe respiratory depression and even death.
The ARK Fentanyl II assay can detect fentanyl in human urine but cannot differentiate between misuse and correct ingestion.
Package Inserts