How does an immunoassay test detect drug classes?

How does an immunoassay test detect drug classes?

Immunoassay. The IA drug test uses antibodies to detect the presence of selected drugs and/or their metabolites based on a predetermined cutoff threshold. 8 Immunoassay monitoring is the initial qualitative test to identify the presence of drug classes in the urine based on a detection threshold.

How accurate is immunoassay drug test?

The index test provided false-positive results for non-opioid use in 44% or 83 of 120 patients. For illicit drugs, the false-positive rate by index test was 0% for cocaine, whereas it was 2% for marijuana, 0.9% for amphetamines, and 1.2% for methamphetamines.

What is immunoassay interference drug test?

An immunoassay is a biochemical test that measures the presence or concentration of a molecule in a solution – usually serum or urine. This is achieved through the use of an antibody or an antigen.

What shows up on a urine drug screening?

Urine drug testing may screen for multiple substances, including amphetamines, methamphetamines, benzodiazepines, barbiturates, marijuana, cocaine, opiates, PCP, methadone, nicotine, and alcohol.

What drugs can immunoassay detect?

The initial screening test is usually an immunoassay, a qualitative test that screens for the five major drug classes targeted by federal workplace testing programs: opioids, cannabinoids, cocaine, amphetamines, and phencyclidine.

What is a presumptive test for drugs?

Presumptive tests, also known as preliminary tests or field tests, allow drugs to be quickly classified into a particular chemical group, but do not unequivocally identify the presence of a specific chemical compound.

What does an immunoassay test for?

Immunoassay Overview Immunoassays can be used to test for the presence of a specific antibody or a specific antigen in blood or other fluids. When immunoassays are used to test for the presence of an antibody in a blood or fluid sample, the test contains the specific antigen as part of the detection system.

What is a LC-MS drug test?

LC-MS/MS in Drugs of Abuse Testing for Target Screening and Quantitative Confirmation. Drugs of abuse testing is performed to identify drug abuse, to monitor someone with a substance abuse problem, or to detect drug intoxication and overdose.

What is BUP on a drug test?

SUMMARY AND EXPLANATION OF THE TEST Buprenorphine (BUP) is a potent analgesic often used in the treatment of opiate abusers. Many factors influence the length of time required for drugs to be metabolized and excreted in the urine.

What are metabolites in urine?

As a biological waste material, urine typically contains metabolic breakdown products from a wide range of foods, drinks, drugs, environmental contaminants, endogenous waste metabolites and bacterial by-products. Many of these compounds are poorly characterized and poorly understood.

What can a urine dipstick test detect?

A dipstick test checks for:

• Acidity (pH). The pH level indicates the amount of acid in urine.
• Concentration. A measure of concentration shows how concentrated the particles are in your urine.
• Protein. Low levels of protein in urine are typical.
• Sugar.
• Ketones.
• Bilirubin.
• Evidence of infection.
• Blood.

How do you fail a urine drug test?

Urine Drug Test Urine tests can occasionally return false-positive drug test results. Eating certain foods that contain the chemical compounds used in prescription or illicit drugs can cause a person to fail a drug test. Eating poppy seeds, for example, can technically throw up a red flag for suspected opioid use.