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Phencyclidine (PCP) Drug Screen (Plasma)

Published: August 9, 2026Updated: August 16, 2026

This test checks for phencyclidine (PCP), a synthetic drug sometimes used recreationally or in illegal manufacturing. It helps determine if you’ve recently used this substance.

Quick summary

["PCP is a powerful psychoactive drug that can affect your mind and body—this test helps track recent use."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
73210-7
Short code
Perphenazine ind plt IgM SerPl Ql FC
Synonyms
Perphenazine ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you’ve been exposed to PCP, if you’re suspected of using it, or as part of a broader drug screening (e.g., workplace, legal, or pre-employment). It can also be used in medical emergencies where PCP toxicity is a concern.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample (plasma) drawn from a vein in your arm. The process takes a few minutes, and you may feel slight discomfort but no lasting effects.

What the Results Mean

Positive results indicate recent PCP use. Negative results mean the drug wasn’t detected in your system at the time of testing. Results are qualitative (yes/no) rather than quantitative, so they don’t show exact amounts.

What the Results Could Indicate

Positive results may signal recent exposure or use, which could affect your judgment, coordination, or health. Always follow up with your doctor if you receive a positive result, as they can guide next steps (e.g., detox support, counseling).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

PCP is a potent hallucinogen and stimulant that can cause severe side effects, including confusion, aggression, or respiratory distress. Detecting it helps healthcare providers assess risks, monitor symptoms, and intervene if needed. This test is often part of broader evaluations for substance use disorders or legal/employment-related screenings.

Short name

PCP Drug Test

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times.
What if I’ve used PCP recently?
If you’ve used PCP, the test may still detect it even if you’ve stopped using it. The drug can stay in your system for days to weeks, depending on how much was used and individual metabolism.
Can I drink alcohol before this test?
No, avoid alcohol for 24 hours before testing, as it may interfere with lab results or affect your safety during the blood draw.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy