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Drug Testing
by Erowid
Tested for in Standard Drug Tests?
Tested for in Extended Drug Tests?
Possible to Test for?
Detection Period in Urine
3-7 days (single use)
Detection Period in Urine
up to 30 days (regular use)

Urine Testing
10% of PCP is excreted unchanged in the urine. The remainder is metabolized into hydroxylate or glucuronide. Standard urine screening and gc/ms test for both PCP and its metabolites. PCP is stored by the body in fatty lipid tissue for up to several weeks. Chronic users and individuals with high body fat count are at the greatest risk of long-term detection.

Hair Testing
PCP is detectable with hair tests and is included in the standard set of substances tested for by many companies. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.

Blood Testing
PCP is detectable in the blood for approximately 1-3 days after use.

Substances or Conditions which can cause false positives.
Urine drug screen (UDS) for PCP is considered to have poor specificity for PCP (Castelli et al 2015).

  • In Urine Tests: venlafaxine (Effexor); dextromethorphan (DXM); ketamine;
  • In Urine Tests: DXM, tramadol, and 24 of 53 false positives for PCP had no identified / known "interfering agent" (Castelli, et al. 2015)
  • In Urine Tests: MDPV. One article reports that MDPV caused false positives for phencyclidine (PCP). See Macher AM, Penders TM. 2012.
    Erowid's drug testing information is a summary of data gathered from site visitors, journal articles, websites, and other resources. Detection periods depend on amount and frequency of use, metabolic rate, body mass, age, overall health, drug tolerance, and urine pH of each individual. Many substances that are not tested for in basic or extended urinalysis tests CAN be tested for by a laboratory willing to go to the trouble, although that is uncommon.

    Revision History #
    • v1.0 - Jul 12, 2002 - Erowid - Initial PCP Testing, Analysis, and Drug Screening summary page.
    • v1.1 - Unknown - Erowid - Updated to new style
    • v1.1 - Oct 10, 2015 - Erowid - Added Castelli, et al. 2015 and info