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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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Item Value
Available Stat? Yes
Test code PCPP
Performed by? Chemistry
Sendout? no
Price range $$
In House Availability Stat or routine, 24 hours/7days
Principle Competitive immunoassay using DRI technology
Interpretation CLINICAL SIGNIFICANCE: The phencyclidines have no medicinal uses. Abuse of this drug is due to its hallucinatory effects.

CUTOFF: 25 ng/mL

Drug Detection Period (approximate guideline) = 3-8 days.

Positive screening results are reported as "Preliminary Positive - confirmation will be performed" and specimens are referred automatically for confirmation testing and identification of the specific agent using GC/MS.
Normal range negative
Synonyms PCP;
Stability 3 days at 2-8°C.
Interferences The immunoassay for phencyclidine cross-reacts with dextromethorphan and metabolites of diphenhydramine. Given the much higher prevalence of use of these over-the-counter cold medications, the vast majority of positive results for Phencyclidine (PCP) are falsely positive. Therefore, the use of this test as part of a general urine drug screen is not indicated. However, if there are clinical signs suggestive of PCP use, such as aggressive, uncontrolled, and combative behavior, the PCP urine test may be useful.
Turn around times Screening results are reported within 1 to 8 hours. Confirmation results will be reported as a separate test when they are completed (1-4 days).
References 1. Wu AHB, Broussard LA, Hoffman RS, Kwong TC, McKay C, Moyer TP, Otten EM, Welch SL, Wax P. National Academy of Clinical Biochemistry. Laboratory Medicine Practice Guidelines. Recommendations for the Use of Laboratory Tests to Support the Impaired and Overdosed Patients from the Emergency Department. Clin Chem 2003; 49:357-79.
CPT coding 80101
Last Updated 10/22/2012 7:45:51 PM
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