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Emergency and Acute Medicine-MDMA Poisoning
Basics description
MDMA (3,4-methylenedioxymethamphetamine), commonly known as ecstasy, is a Schedule I illicit drug used recreationally at rave parties, dance clubs, and college campuses. Onset of effects typically occurs 15–30 minutes after ingestion, with a duration of 2–6 hours. Pills often contain contaminants such as caffeine, ephedrine, dextromethorphan, or ketamine. Related compounds include MDA, MDEA, MDBA, and PMA. MDMA has an amphetamine-like structure that increases catecholamine release and a mescaline-like ring that enhances serotonergic and dopaminergic activity.
Etiology
Toxicity results from deliberate or accidental ingestion of MDMA, often compounded by coingestants or adulterants.
Diagnosis signs and symptoms
Patients may present with altered mental status, severe sympathomimetic features, or hyperthermia. Neurologic findings include excitation, delirium, hallucinations, seizures, coma, and cerebral edema. Cardiovascular manifestations include early hypertension, late hypotension, palpitations, ventricular dysrhythmias, and ectopy. Pulmonary edema may occur. Metabolic complications include hyponatremia, hypoglycemia, and syndrome of inappropriate antidiuretic hormone secretion. Musculoskeletal findings include bruxism, rigidity, and restlessness, with rhabdomyolysis leading to renal failure. Hepatic injury ranges from hepatitis to jaundice, and hematologic complications include disseminated intravascular coagulation. Gastrointestinal symptoms include nausea, vomiting, diarrhea, and abdominal cramping. Other features include hyperthermia, mydriasis, and nystagmus.
Essential workup and diagnostic testing
Diagnosis is primarily clinical, supported by history and examination. Core temperature measurement is critical. Laboratory evaluation includes electrolytes, glucose, BUN, creatinine, coagulation studies, creatine phosphokinase, liver function tests, and urine studies for myoglobin. Urine toxicology screening may show amphetamines but is unreliable for MDMA specificity. ECG commonly shows sinus tachycardia with possible dysrhythmias. Imaging is guided by presentation, with chest radiography for aspiration or pulmonary edema and head CT for suspected intracranial pathology.
Differential diagnosis
Cocaine or amphetamine overdose, anticholinergic toxicity, synthetic cathinone intoxication, serotonin syndrome, sepsis, thyroid storm, pheochromocytoma, or occult head injury.
Treatment and emergency management
Management is supportive and focused on airway protection, oxygenation, IV access, and continuous monitoring. Benzodiazepines are first-line for agitation, anxiety, and seizures. Aggressive IV hydration with isotonic fluids is essential, particularly in rhabdomyolysis. Hyperthermia is treated with active cooling and sedation. Hypertension may require agents such as nitroprusside or phentolamine, while hypotension is treated with fluids and vasopressors as needed. Severe rhabdomyolysis or renal failure may require hemodialysis. Patients should be monitored for at least 6 hours.
Disposition and follow-up
Admission is required for patients with altered mental status, seizures, cardiovascular instability, rhabdomyolysis, disseminated intravascular coagulation, or loss of behavioral control. Asymptomatic patients may be discharged after 6 hours of observation. Substance use counseling is recommended, with psychiatric evaluation for intentional overdose.
Key points and pitfalls
Always obtain a core temperature and evaluate for hyponatremia in patients with persistent altered mental status. Routine toxicology screens may not detect MDMA or coingestants. Consider non-toxicologic causes of deterioration and recognize that hyperthermia and rhabdomyolysis are major causes of morbidity and mortality.
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