DSS - Clinical: Drug Screen, Prescription/OTC, Serum

Test Catalog

Test Name

Test ID: DSS    
Drug Screen, Prescription/OTC, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Detection and identification of prescription or over the counter drugs frequently found in drug overdose or used with a suicidal intent


This test is designed to qualitatively identify drugs present in the specimen; quantification of identified drugs, when available, may be performed upon client request

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

This test looks for a broad spectrum of prescription and over-the-counter (OTC) drugs. It is designed to detect drugs that have toxic effects, as well as known antidotes or active therapies that a clinician can initiate to treat the toxic effect. The test is intended to help physicians manage an apparent overdose or intoxicated patient, or to determine if a specific set of symptoms might be due to the presence of drugs. This test is not appropriate for drugs of abuse or illicit drug testing, including benzodiazepines, opioids, barbiturates, cocaine, amphetamine type stimulants.


Drugs of toxic significance that are not detected by this test are: digoxin, lithium, and many drugs of abuse or illicit drugs, some benzodiazepines, and some opioids.


See Prescription and Over-the-Counter (OTC) Drug Screens in Special Instructions for detection limits for drugs detected in this test.

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.

Drugs detected are presumptive. Additional testing may be required to confirm the presence of any drugs detected.

Interpretation Provides information to assist in interpretation of the test results

The drugs that are detected by this test are listed in Prescription and Over-the-Counter (OTC) Drug Screens in Special Instructions.


The pharmacology of each drug determines how the test should be interpreted. A detailed discussion of each drug is beyond the scope of this text. If you wish to have a report interpreted, call Mayo Medical Laboratories and ask for a toxicology consultant.


Each report will indicate the drugs detected.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

Not intended for therapeutic compliance testing.


Not intended for use in employment-related testing.


This test is not appropriate for drugs of abuse or illicit drug testing, including benzodiazepines, opioids, barbiturates, cocaine, amphetamine type stimulants. 

  For situations where chain of custody is required, order DSSX / Drug Screen, Prescription/OTC, Chain of Custody, Serum.

Clinical Reference Recommendations for in-depth reading of a clinical nature

1. Langman LJ, Bechtel L, Holstege CP: Clinical toxicology. In Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. Edited by CA Burtis, ER Ashwood, DE Bruns. Fifth edition. St. Louis, MO, Elsevier Saunders, 2012 pp 1109-1188

2. Disposition of Toxic Drugs and Chemicals in Man. 10th edition. Edited by RC Baselty. South Beach CA, Biomedical Publications, 2014

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test