How Long Does PCP Stay in Your System: Blood, Urine, and Saliva

Phencyclidine (PCP) is a dissociative hallucinogen that affects brain function by altering perception, mood, and behavior. Although it was once used medically, it was banned due to its adverse reactions. PCP continues to be a public health problem today due to the high risk of dependence, cognitive deficits, and unpredictable behavior.

The length of time that PCP stays in the system is an important consideration for clinicians, patients, and families. Because various tests differ in detection times—such as blood, urine, saliva, or hair—it is important to understand how PCP is metabolized and detected in toxicology testing.

What Is PCP?

Phencyclidine (PCP) is an illegal street drug that usually comes as a white powder, which can be dissolved in alcohol or water [1]. It was quickly removed from medical use as patients experienced very intense hallucinations, agitation, and neuropsychiatric effects. Currently, PCP is designated as a Schedule II substance in the United States, indicating a high potential for abuse and dependence as well as a lack of recognized medicinal use.

On the street, PCP is generally in the form of a white crystalline powder or liquid and can be smoked, ingested, or snorted. The impact it has on the central nervous system can be quite variable, producing anything from euphoria and dissociation to aggression and psychosis.

Street Names of PCP

PCP is known chemically as phencyclidine, but a variety of slang names are found on the street. These names also serve to mask the drug in social settings and in black markets, thereby avoiding detection and identity. While these may not be all of the names, awareness of these street names can assist your family members, clinicians, and police in recognizing possible use or trafficking.

Common street names for PCP include:

• Angel Dust

• Embalming Fluid

• Rocket Fuel

• Supergrass

• Ozone [2]

• Hog

• Wack

These names vary by region, but they all refer to the same dangerous dissociative substance.

How PCP Is Consumed (Methods of Use)

How PCP is consumed varies based on the method of preparation. It is commonly smoked when users dip cigarettes or “joints” of marijuana into liquid PCP. It can also be taken orally in pill or capsule form, can be snorted in powdered form, or injected in liquid form. Both types are capable of having rapid, unpredictable effects on the brain and body.

Why Do People Use PCP?

PCP is used for its intense mind-altering effects, which include detachment, distorted perception, and hallucinations. Some are even attracted by the particular drug’s ability to create a sense of euphoria, invincibility, a feeling of disconnection from pain or fear. 

In addition, PCP has occasionally been used recreationally within some social situations, frequently with other agents to enhance the experience. But these effects are very unpredictable and can turn rapidly into heavy anxiety, aggression, or paranoia. Frequent use over time can cause tolerance, dependence, and devastating physical and emotional damage.

Risks of Dependence and Misuse

Due to extremely potent hallucinogenic and dissociative properties, PCP has a high potential for abuse. It is psychologically and physically addictive when used more than a couple of times, making it nearly impossible for a user to stop without medical help. Misuse also heightens the chances of reckless activity and chronic health issues.

Key risks of PCP dependence and misuse include:

• Tolerance resulting in increased doses

• Drug-seeking and craving behaviors

• Intense mood swings, paranoia, or aggression

• Memory issues and cognitive deterioration

• Higher likelihood of accidents or self-harm

How And Why Do People Test For PCP?

Because of the unpredictable nature of PCP’s influence on behavior and health, testing for PCP may often be warranted. Employers might also demand drug testing for safety purposes in the workplace, particularly when alertness and coordination are critical. Similarly, healthcare professionals would test for PCP when a patient presented with symptoms of confusion, agitation, or hallucinations that could be attributable to drug use. Police and legal systems might require PCP testing for accidents, driving under the influence, or something illegal. In general, testing is informative for medical safety and treatment planning decisions to minimize the risks of continued use.

Accuracy and Limitations of PCP Tests

PCP drug testing is accurate, although, like all toxicology screens, is not without limitations. Examples of over-the-counter cough suppressants or antidepressants may yield false positives, another reason for testing. Test accuracy is also dependent on the sample used, the timing of the test, and the sensitivity of the lab equipment being used.

Key accuracy considerations and limitations include:

• Possible false positives from certain prescription or OTC medications

• Short detection window in blood and saliva compared to urine or hair

• Variability in results depending on metabolism and body composition

• Potential errors in sample handling or laboratory analysis

• Need for confirmatory testing (such as GC-MS) to verify results

Importance of Testing for Public Safety and Health

The testing of PCP is vital for personal and public safety. Because it is known to elicit erratic behavior, impaired judgment, and aggression, finding it in an individual is a safety and prevention measure against accidents or harm to others. Testing presents advantages in health care settings as well, since clinicians can then treat patients appropriately and address any complications associated with intoxication. More generally, testing helps maintain safe working environments, driving while impaired, and tracking community use of substances.

How Long Can PCP Be Detected Through Testing?

The detectability of PCP also depends on how long someone has been using it, how much they use, and what type of test is being done. As PCP is sequestered in fat, it may also remain in the system longer than many other substances. Blood tests typically detect PCP for a shorter period than urine and hair tests, which can detect it for much longer periods of time. 

Saliva testing has a shorter detection window but is often used for recent use. Clinicians, employers, and judiciaries need to be aware of these distinctions when considering test outcomes and making decisions.

Factors That Influence Detection Time

The length of time PCP stays detectable in the body can vary widely from person to person. Among these, several biological and lifestyle factors influence the speed and efficiency with which the drug is metabolized and eliminated. These variables account for the fact that two individuals using equal quantities of PCP may have considerably different test outcomes.

Key factors that influence detection time include:

• Frequency and duration of PCP use

• Amount or dosage consumed

• Individual metabolism rate

• Body fat percentage, since PCP is stored in fatty tissues

• Age, weight, and overall health status

• Hydration levels and kidney or liver function

Limitations of At-Home Drug Tests for PCP

Home drug testing kits for PCP can be easily purchased, but they lack the reliability of laboratory testing. While these kits can provide a rapid result, they are not always sensitive to low levels of PCP. They can be misread or affected by cross-reaction with other drugs or materials. For this reason, positive results from at-home tests should always be confirmed through professional laboratory testing.

Limitations of at-home PCP tests include:

• Higher risk of false positives or false negatives

• Limited sensitivity compared to lab-based tests

• Difficulty interpreting faint or unclear results

• Potential cross-reactivity with prescription or OTC medications

• No access to confirmatory testing without a lab follow-up

What Are The Signs Of a PCP Use Disorder?

The disruption occurs when a person begins using PCP to the point that it adversely affects their well-being, relationships, or responsibilities. One indication that a problem is developing is tolerance, or requiring greater quantities of PCP to experience the same effects. There may be the presence of cravings, and a significant amount of time spent on obtaining or using the drug or engaging in related activities. 

Even when the drug is causing harm. They also show behavioral changes such as aggression or paranoia, or withdrawal from family and social activities. Long-term use can also lead to devastating psychological dependence, cognitive deficits, and an inability to function without the substance.

Physical Symptoms of PCP Misuse

Physical effects of PCP use are common and dose- and frequency-dependent. These symptoms can be sudden in onset and pose a risk to the patient for accidents or medical emergencies. It is important to note these red flags to be proactive and to treat them.

Common physical symptoms of PCP misuse include:

• High blood pressure and a fast heartbeat 

• Loss of coordination or numbness 

• Rigidity of muscles or odd body movements

• Profuse sweating or dizziness

• Slurred speech and difficulty walking

• Nausea, vomiting, or blurred vision

FAQs

Does PCP show up on a drug test?

Yes, PCP does show up on drug tests, including the most common one, urine testing. Blood, saliva, and hair analyses can also detect PCP use. However, the exact results will vary based on timing and sensitivity. Windows of detection will vary according to metabolism, frequency of use, and method of detection.

What medications make you test positive for PCP?

Certain medications can cause false positives for PCP on drug tests. These include common drugs like dextromethorphan (found in cough syrups), tramadol, venlafaxine, and some antihistamines. Because of this cross-reactivity, confirmatory testing such as gas chromatography–mass spectrometry (GC-MS) is often required to verify whether the result is truly accurate.

Can ibuprofen make you test positive for PCP?

Yes, in some cases, ibuprofen has been reported to cause a false positive for PCP on preliminary immunoassay screenings. This happens because the chemical structure of ibuprofen may interfere with test results. To confirm accuracy, follow-up laboratory testing using more precise methods like GC-MS is typically recommended by professionals.

Why would a PCP order a urine test?

A primary care provider (PCP) may order a urine test to screen for drug use, monitor ongoing treatment, or evaluate unexplained symptoms like confusion, agitation, or abnormal behavior. Urine tests are widely used because they are cost-effective, noninvasive, and can detect substances like PCP for longer durations compared to blood.

Get Treatment for PCP Addiction at Alliance Recovery

If you or a loved one is struggling with PCP addiction, don’t wait to seek help. Our experienced treatment team at Alliance Recovery specializes in guiding individuals through evidence-based treatments, compassionate care, and personalized recovery plans designed to restore health and stability.

At Alliance Recovery, our leadership and admissions staff bring deep knowledge of addiction treatment, with many team members having personally experienced the journey of recovery. This lived experience drives our passion for connecting with those in need and offering genuine support.

When you choose Alliance Recovery, you’ll find:

• Real, empathetic care from people who understand your struggles

• Comprehensive, evidence-based treatment programs

• Individual and group therapy sessions

• Personalized treatment tailored to your needs

• A supportive sober community and dedicated staff

• Aftercare planning and career placement assistance

Your path to recovery starts here. Call our treatment team today at (844) 287-8506 and take the first step toward freedom from PCP addiction.

Sources:

[1] https://medlineplus.gov/ency/patientinstructions/000797.htm

[2] https://deadiversion.usdoj.gov/drug_chem_info/pcp.pdf

[3] https://www.ncbi.nlm.nih.gov/books/NBK507865/