Test ID: NPAIN
Pain Clinic Drug Screen, Urine
Useful For 
Suggests clinical disorders or settings where the test may be helpful
Detection and identification of drugs of abuse
This test is intended to be used in a setting where the identification of the drug is required.
Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
This profile was designed to test for and confirm the most common classes of drugs of abuse.
Opiate confirmation is performed on all specimens by liquid chromatography mass spectrometry(LC-MS/MS).
This profile uses immunoassay testing for drugs of abuse by class. All positive screening results are confirmed by gas chromatography/mass spectrometry (GC/MS).
Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Negative for drugs of abuse
EMIT Screening cutoff concentration:
Amphetamines: 500 ng/mL
Barbiturates: 200 ng/mL
Benzodiazepines: 200 ng/mL
Cocaine (benzoylecgonine-cocaine metabolite): 150 ng/mL
Ethanol: 10 mg/dL
Methadone: 300 ng/mL
Opiates: 300 ng/mL
Phencyclidine: 25 ng/mL
Propoxyphene: 300 ng/mL
Tetrahydrocannabinol carboxylic acid: 50 ng/mL
This report is intended for use in clinical monitoring and management of patients. It is not intended for use in employment-related drug testing.
Interpretation Provides information to assist in interpretation of the test results
A positive result derived by this testing indicates that the patient has been exposed in the recent past to the drugs identified.
Positive results are definitive.
A detailed discussion of each drug detected is beyond the scope of this text. Each report will indicate the drugs identified. If a clinical interpretation is required, please contact Mayo Laboratory Inquiry.
Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
This report is intended for use in clinical monitoring and management of patients. It is not intended for use in employment-related drug testing.
Clinical Reference Provides recommendations for further in-depth reading of a clinical nature
1. Goodman & Gilman's: The Pharmacological Basis of Therapeutics. Tenth edition. New York, McGraw-Hill Professional, 2001
2. Porter WF: Clinical toxicology. In Teitz Textbook of Clinical Chemistry and Molecular Diagnostics. Fourth edition. St Louis, MO, Elsevier Saunders, 2006
3. Principles of Forensic Toxicology. Second edition. Washington DC, AACC Press, 2003, p 385
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