Phencyclidine (PCP) intoxication

Overview


Plain-Language Overview

Phencyclidine (PCP) intoxication is a condition caused by the use of a powerful recreational drug that affects the brain and nervous system. This drug can cause a range of effects including hallucinations, confusion, and violent behavior. It interferes with normal brain communication, leading to changes in perception, mood, and movement. People under the influence may experience numbness, loss of coordination, and sometimes dangerous agitation. The condition can also affect the heart and breathing, making it a serious health concern.

Clinical Definition

Phencyclidine (PCP) intoxication is a toxic state resulting from the ingestion or inhalation of PCP, a dissociative anesthetic that acts primarily as an NMDA receptor antagonist in the central nervous system. This blockade disrupts normal glutamatergic neurotransmission, leading to psychotomimetic effects such as hallucinations, delirium, and agitation. The condition is characterized by a combination of neurologic, psychiatric, and autonomic symptoms, including nystagmus, hypertension, tachycardia, and muscle rigidity. PCP intoxication can cause severe neurotoxicity and may result in seizures, hyperthermia, and rhabdomyolysis. It is a medical emergency due to the risk of violent behavior and life-threatening complications.

Clinical Presentation


Diagnostic Workup


Pathophysiology


Treatments


Prevention


Outcome & Complications


Differential Diagnoses


Medical Disclaimer: The content on this site is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you think you may be experiencing a medical emergency, call 911 or your local emergency number immediately. Always consult a licensed healthcare professional with questions about a medical condition.

Artificial Intelligence Use: Portions of this site’s content were generated or assisted by AI and reviewed by Erik Romano, MD; however, errors or omissions may occur.

Analytics Disclosure: If you allow analytics cookies, Doctogenic uses Google Analytics, Microsoft Application Insights, and Microsoft Clarity to understand site usage, diagnose issues, review heatmaps and session replay recordings, and improve the service on pages where those tools are enabled. Clarity is not enabled on account, purchase, billing, checkout, Stripe-related, or admin pages. You can change this choice through Cookie preferences.

USMLE® is a registered trademark of the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME). Doctogenic and Roscoe & Romano are not affiliated with, sponsored by, or endorsed by the USMLE, FSMB, or NBME. Neither FSMB nor NBME has reviewed or approved this content. "USMLE Step 1" and "USMLE Step 2 CK" are used only to identify the relevant examinations.