Question 1

What is PCP and what does it do to your brain?

Accepted Answer

PCP (phencyclidine) is a dissociative drug that was originally developed as an anesthetic. It works primarily by blocking NMDA receptors in the brain, which disrupts normal glutamate signaling. This causes feelings of detachment from one's body and environment, along with distorted perceptions. PCP also affects dopamine, serotonin, and norepinephrine systems, which can cause stimulant-like effects, mood changes, and psychosis-like symptoms. The combination of effects makes PCP uniquely dangerous—users may experience hallucinations, feel invincible, lose pain sensitivity, and behave unpredictably or violently.

Question 2

How can you tell if someone is on PCP?

Accepted Answer

PCP intoxication has distinctive signs: characteristic eye movements called nystagmus (rapid, involuntary eye movements, especially vertical), aggressive or unpredictable behavior that can switch suddenly, decreased response to pain (users may injure themselves without reacting), poor coordination and slurred speech, blank staring or dissociated appearance, and sometimes superhuman-seeming strength. Users may be paranoid, experience hallucinations, or show bizarre behavior. They often have elevated blood pressure and heart rate. The combination of dissociation, nystagmus, and decreased pain response is particularly characteristic of PCP rather than other substances.

Question 3

Can you become addicted to PCP?

Accepted Answer

Yes, regular PCP use can lead to a substance use disorder characterized by cravings, difficulty controlling use, continued use despite harmful consequences, and tolerance (needing more to achieve the same effects). While PCP doesn't cause the same physical withdrawal syndrome as alcohol or opioids, users develop psychological dependence and experience strong cravings. People often continue using despite negative consequences like arrests, injuries, relationship problems, or employment issues. The dissociative 'escape' PCP provides can be particularly reinforcing for people dealing with trauma or psychological pain.

Question 4

Is PCP dangerous? What are the risks?

Accepted Answer

PCP is extremely dangerous for multiple reasons. Immediate risks include violent or self-destructive behavior (users may hurt themselves or others without awareness), life-threatening injuries from not feeling pain or believing they're invincible, medical emergencies like seizures, extremely high blood pressure, or hyperthermia, psychotic symptoms including terrifying hallucinations and paranoia, and accidents due to severely impaired coordination and judgment. Long-term risks include persistent cognitive problems (memory, attention, processing speed), lasting psychiatric symptoms, physical injuries from intoxicated behavior, legal consequences from aggressive or bizarre behavior, and potential permanent neurological damage with chronic use.

Question 5

How long do PCP effects last?

Accepted Answer

PCP effects typically begin within 2-5 minutes when smoked and 30-60 minutes when taken orally. The acute intoxication phase usually lasts 4-6 hours but can persist much longer with high doses—sometimes 24-48 hours. Physical effects and psychological symptoms gradually diminish but users may experience confusion, memory problems, or mood changes for days afterward. Chronic users may develop persistent cognitive and psychiatric symptoms that continue between uses. The duration is significantly longer than similar dissociatives like ketamine, which is one factor that makes PCP particularly dangerous.

Question 6

What should you do if someone is having a bad reaction to PCP?

Accepted Answer

Call 911 immediately. PCP intoxication can be a medical emergency. While waiting for help: prioritize safety—remove dangerous objects and keep a safe distance if the person is aggressive, don't try to physically restrain them unless absolutely necessary as this can escalate agitation, keep the environment calm and quiet (loud noises or bright lights can worsen agitation), don't leave them alone, and protect them from self-harm. Medical treatment may include benzodiazepines for severe agitation, monitoring of vital signs (blood pressure, heart rate, temperature), and supportive care. Do not try to 'talk them down'—they likely can't process information normally while intoxicated.

Question 7

Can PCP cause permanent damage?

Accepted Answer

Yes, PCP can cause lasting effects, especially with chronic use. Research shows persistent cognitive impairments including memory problems, decreased attention span, difficulty with problem-solving and executive functions, and slower processing speed. Some users develop ongoing psychiatric symptoms like paranoia, depression, or psychotic symptoms even when not using. Brain imaging studies suggest possible long-term changes in brain structure and function. There may also be permanent physical damage from injuries sustained during intoxication (broken bones, head injuries). However, some cognitive function may improve with sustained abstinence, and the extent of recovery varies by individual and use history.

Question 8

Why do people become violent on PCP?

Accepted Answer

PCP's effects on multiple brain systems create conditions for aggression and violence: the drug disrupts normal perception and thinking, so users may misinterpret others' intentions as threatening; it reduces pain sensitivity and can create feelings of invincibility, removing normal deterrents to aggression; it affects dopamine and other systems in ways that increase impulsivity and reduce behavioral control; users often experience paranoia and may feel they're defending themselves from perceived threats; and the profound dissociation means users aren't fully aware of their actions or consequences. Not all PCP users become violent, but the risk is significant enough that PCP intoxication is a psychiatric emergency.

Question 9

What's the difference between PCP intoxication and PCP use disorder?

Accepted Answer

PCP intoxication refers to the acute state of being under the influence of PCP—the behavioral changes, physical signs, and psychological symptoms that occur during and shortly after using the drug. It's a temporary condition that resolves as the drug leaves the system. PCP use disorder is a pattern of problematic use over time characterized by impaired control over use, continued use despite negative consequences, cravings, tolerance, and interference with responsibilities. Someone can experience intoxication without having a use disorder (such as a first-time user or someone exposed without consent), or they may have a use disorder that includes repeated episodes of intoxication along with ongoing issues controlling their use.

Question 10

How is PCP different from angel dust?

Accepted Answer

They're the same substance—'angel dust' is a street name for PCP (phencyclidine). Other street names include 'wet,' 'sherm,' 'rocket fuel,' 'embalming fluid,' and 'peace pill.' PCP is sometimes sold as powder ('angel dust') that can be snorted or mixed with tobacco or marijuana for smoking. The drug may also come as pills, capsules, or liquid. Regardless of the name or form, it's the same dangerous dissociative drug. The variety of street names can make it harder to know what substance someone has actually used, which is why specific toxicology testing is often needed to identify PCP.

Question 11

Can you test for PCP use?

Accepted Answer

Yes, but PCP testing requires specific screening—it's not always included in standard drug tests. PCP can be detected in urine typically for 7-14 days after use in occasional users, and potentially longer (up to 30 days) in chronic heavy users. It can also be detected in blood, saliva, and hair. However, many employers' standard 5-panel drug tests don't include PCP, which means use can be missed. If PCP intoxication is suspected clinically (based on symptoms like nystagmus, behavior, and vital signs), doctors can order specific PCP testing. This is one reason PCP use is sometimes missed in initial evaluations—it has to be specifically looked for.

Question 12

What treatment is available for PCP use disorder?

Accepted Answer

Treatment typically involves comprehensive substance abuse treatment including: behavioral therapies like cognitive-behavioral therapy (CBT) to identify triggers and develop coping strategies, motivational interviewing to address ambivalence about quitting, and contingency management providing rewards for maintaining abstinence. There are currently no FDA-approved medications specifically for PCP use disorder, but treatment may include medications for co-occurring conditions like depression or anxiety. Treatment also addresses any cognitive deficits through cognitive rehabilitation, provides peer support through groups like NA, and includes relapse prevention planning. For people who have experienced PCP-related trauma or violence, trauma-informed care is important. Success requires addressing the underlying reasons someone was using PCP.

Question 13

PCP vs ketamine: What's the difference?

Accepted Answer

Both are dissociative anesthetics that block NMDA receptors and produce out-of-body experiences, but they differ significantly. Duration: PCP effects last 4-6+ hours while ketamine lasts 45-90 minutes. Behavioral effects: PCP much more commonly causes severe agitation, unpredictability, and violence, while ketamine typically causes more sedation. Medical use: Ketamine is still used as an anesthetic and for treatment-resistant depression; PCP is not used medically. Controllability: Ketamine's shorter duration allows more control over the experience; PCP's long duration can lead to prolonged dangerous states. Safety profile: While both carry risks, PCP is generally considered more dangerous due to longer duration, greater unpredictability, and higher association with violent behavior.

Question 14

PCP vs methamphetamine: How can you tell them apart?

Accepted Answer

Both can cause agitation, paranoia, and violent behavior, but they have distinct features. Eye signs: PCP causes nystagmus (rapid involuntary eye movements), especially vertical, while methamphetamine causes dilated pupils. Energy level: Methamphetamine is a stimulant causing extreme wakefulness and energy, while PCP causes more dissociation and unpredictable shifts between agitation and stupor. Pain response: PCP users have notably decreased pain sensitivity; this is not characteristic of methamphetamine. Duration: Methamphetamine effects last 8-12 hours with prolonged wakefulness; PCP intoxication is typically shorter but with more severe acute behavioral changes. Physically: Methamphetamine use often shows repetitive behaviors and jaw clenching; PCP shows more ataxia and muscle rigidity.

Question 15

PCP vs schizophrenia: How can doctors tell the difference?

Accepted Answer

This is challenging because PCP intoxication can look almost identical to a schizophrenia psychotic episode, with hallucinations, delusions, and bizarre behavior. Key distinguishing factors: Timeline—PCP symptoms are acute with sudden onset after substance use and resolve within hours to days; schizophrenia develops gradually and symptoms persist. Physical signs—PCP causes nystagmus, elevated blood pressure, decreased pain response, and ataxia not present in schizophrenia. Toxicology—specific testing can detect PCP in the system. History—is there a known pattern of substance use? Prior episodes? However, complications include: PCP isn't always tested for, the person may not disclose use, chronic PCP use can cause lasting psychotic symptoms, and some people have both schizophrenia and substance use disorder. When in doubt, substance-induced psychosis is often assumed until proven otherwise.

Question 16

Why isn't PCP more common if it's so powerful?

Accepted Answer

Several factors limit PCP use despite its potent effects: the high risk of extremely negative experiences (terrifying hallucinations, loss of control, violent behavior), cultural reputation as one of the most dangerous street drugs, difficulty in production compared to some other substances, and geographic concentration (use is not evenly distributed and may be more common in certain regions and subcultures). The unpredictability of effects—users can't control whether they'll have a 'good trip' or a terrifying, dangerous experience—makes it less appealing than substances with more predictable effects. Additionally, the long duration and severity of intoxication can be off-putting. Most substance users seek some form of pleasurable or controllable experience, and PCP's reputation for causing bizarre and dangerous behavior serves as a deterrent.

Question 17

Can you overdose on PCP?

Accepted Answer

Yes, PCP overdose can be life-threatening. High doses can cause seizures, severely elevated blood pressure and heart rate, dangerous hyperthermia (overheating), respiratory depression, coma, and stroke or cardiac arrest. Death can also result from behavioral effects—injuries from violence or accidents, dangerous decisions while believing one is invincible, or complications from prolonged agitation. There's no specific antidote for PCP overdose, so treatment is supportive: managing agitation with sedatives, cooling for hyperthermia, treating seizures, and monitoring vital functions. The unpredictable potency of street PCP (which may be mixed with other substances) makes dosing difficult and overdose risk significant, especially for people who are using for the first time or after a period of abstinence.

Question 18

What happens to your body during PCP withdrawal?

Accepted Answer

Unlike alcohol or opioids, PCP doesn't produce a severe or dangerous physical withdrawal syndrome. However, people who stop chronic PCP use often experience psychological withdrawal that can be challenging: intense drug cravings, depression or dysphoria, fatigue and sleep disturbances, anxiety and irritability, and sometimes flashbacks or brief psychotic symptoms. Cognitive difficulties may persist (trouble concentrating, memory problems). Some users report feeling disoriented or having difficulty reconnecting with reality. These symptoms typically peak within the first week but can persist for weeks to months. While not medically dangerous, the psychological discomfort and cravings are significant barriers to quitting. Treatment focuses on supportive care, addressing mood symptoms, and intensive behavioral support during this vulnerable period.

Question 19

Why would someone use PCP knowing how dangerous it is?

Accepted Answer

People use PCP for various reasons despite the risks: some are seeking the dissociative escape from reality, physical pain, or emotional distress; others are drawn by curiosity or peer influence without fully understanding the dangers; some people inadvertently use it (PCP may be used to lace marijuana or other substances without users' knowledge); and individuals with existing substance use disorders may have impaired risk assessment. For those who continue use after initial exposure, the powerful dissociative effects can be reinforcing, especially for people dealing with trauma, chronic pain, or mental health issues. Once a pattern develops, cravings and psychological dependence make quitting difficult despite awareness of risks. Additionally, misinformation or minimization of dangers within certain social groups can influence continued use.

Question 20

How do I know if my marijuana might be laced with PCP?

Accepted Answer

Unfortunately, it's very difficult to tell by appearance alone. Warning signs that might indicate PCP-laced marijuana include: unusual chemical smell (PCP can have a distinctive chemical or ether-like odor), marijuana that seems unusually wet or oily, being offered marijuana from unfamiliar sources or described with unusual street names like 'wet,' 'fry,' or 'sherm,' and marijuana sold at unusually low prices. The only certain way to know is through chemical testing. If you use marijuana, reduce risks by: obtaining it from reliable, legal sources where possible, being cautious about trying marijuana from new or unknown sources, never using alone when trying a new supply, and knowing the signs of PCP intoxication so you can seek help immediately if they occur. Most importantly, if you experience profound dissociation, nystagmus, or severe behavioral changes after using marijuana, seek emergency medical care.

Phencyclidine (PCP) Use Disorder and Intoxication

Overview

Description

Prevalence

Age of Onset

ICD-10 Code

What Is PCP Use Disorder?

Recognizing PCP Use

Real-Life Experiences

Diagnosis & Evaluation

Similar Conditions

Treatment & Recovery

Risk Factors & Impact

Common Questions

Prognosis & Outlook

Seeking Help for Phencyclidine (PCP) Use Disorder and Intoxication?