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Anesthesiology15 papers

Episode of harmful use of methamphetamine

Last edited: 1 h ago

Overview

Methamphetamine use disorder (MUD) is characterized by compulsive methamphetamine use despite harmful consequences. This condition has surged in prevalence and associated health harms in the United States, with overdose rates tripling from 2013 to 2019 1. Emergency department visits, poison control center calls, and drug seizures have also risen significantly. In 2019, approximately 1.05 million individuals in the US were estimated to have MUD, marking a substantial increase from previous years 3. Clinicians face the challenge of managing acute episodes of harmful methamphetamine use, which can lead to severe neurotoxic effects, cardiovascular issues, and other life-threatening complications. Understanding and effectively addressing these episodes is crucial for improving patient outcomes and reducing public health burdens 13.

Pathophysiology

Methamphetamine exerts its effects primarily through the release of monoamines, particularly dopamine, norepinephrine, and serotonin, in the central nervous system (CNS). At the molecular level, methamphetamine enters neurons via monoamine transporters, where it is protonated and accumulates in vesicles, leading to their reverse transport and subsequent release into the synaptic cleft 1. This neurochemical surge results in acute euphoria but also triggers neurotoxic cascades, including oxidative stress and mitochondrial dysfunction, particularly in regions like the striatum and prefrontal cortex 4. Chronic use exacerbates these processes, leading to structural and functional brain changes that contribute to cognitive impairments, mood disorders, and increased vulnerability to relapse 14. These neurotoxic pathways underscore the complexity of treating MUD and highlight the need for multifaceted therapeutic approaches 1414.

Epidemiology

The prevalence of methamphetamine use and MUD has notably increased in recent years, particularly affecting certain demographic groups. According to recent estimates, the number of individuals with MUD rose from 684,000 in 2016 to 1,048,000 in 2019 in the United States 3. Methamphetamine use disproportionately impacts younger adults, with peak incidence observed in the 20-34 age range, though it spans across various age groups 1. Geographic trends show higher prevalence in certain regions, such as the western and southwestern parts of the US, where social and environmental factors may contribute to higher usage rates 2. Risk factors include a history of other substance use disorders, mental health conditions like depression and anxiety, and socioeconomic stressors 12. These trends underscore the evolving nature of the epidemic and the need for targeted public health interventions 123.

Clinical Presentation

Acute episodes of harmful methamphetamine use manifest with a constellation of symptoms that can range from mild to severe. Typical presentations include intense euphoria, heightened alertness, hyperactivity, and increased energy levels, often accompanied by hyperthermia, tachycardia, and hypertension 1. Atypical presentations might involve more subtle cognitive disturbances, such as paranoia, hallucinations, and aggressive behavior, which can complicate initial assessments 1. Red-flag features include severe hyperthermia, cardiovascular collapse, and acute psychosis, necessitating urgent medical intervention 1. Recognizing these signs early is crucial for timely diagnosis and management to prevent life-threatening complications 1.

Diagnosis

Diagnosing an episode of harmful methamphetamine use involves a comprehensive clinical evaluation complemented by specific diagnostic criteria and tests. The primary approach includes a detailed history and physical examination, focusing on recent substance use patterns, behavioral changes, and physical symptoms indicative of methamphetamine intoxication 1. Specific diagnostic criteria include:

  • Clinical History: Recent use of methamphetamine, often corroborated by self-report or collateral information.
  • Physical Examination: Signs of hyperthermia, tachycardia (heart rate >100 bpm), hypertension (BP >140/90 mmHg), and agitation.
  • Laboratory Tests:
    • - Urine Toxicology Screening: Positive for methamphetamine metabolites (e.g., amphetamine, methamphetamine, or MDMA). - Blood Tests: Elevated white blood cell count, metabolic acidosis, and electrolyte imbalances (e.g., hyponatremia, hypernatremia).
  • Differential Diagnosis:
    • - Hyperthyroidism: Characterized by weight loss, tachycardia, and anxiety, but without typical methamphetamine-specific metabolites. - Amphetamine Overdose: Similar symptoms but may require differentiation based on specific metabolites and clinical context. - Psychiatric Disorders: Conditions like schizophrenia or mania can mimic methamphetamine-induced psychosis but lack the substance use history 114.

    Management

    Effective management of harmful methamphetamine use episodes involves a stepwise approach tailored to the severity and context of the episode.

    Initial Management

  • Supportive Care:
    • - Hydration and Cooling: Intravenous fluids to correct dehydration and active cooling measures to manage hyperthermia. - Cardiovascular Monitoring: Continuous ECG monitoring and management of arrhythmias or hypotension. - Airway Management: Ensuring airway patency, especially in cases of severe agitation or respiratory distress.
  • Medications:
    • - Benzodiazepines: For agitation and seizures (e.g., lorazepam 1-2 mg IV, titrated as needed). - Antipsychotics: For severe psychosis (e.g., haloperidol 5 mg IM, repeated as necessary). - Anticholinergics: To manage symptoms of hyperthermia (e.g., atropine 0.5-1 mg IV).

    Acute Stabilization

  • Psychiatric Evaluation: Assess for underlying mental health conditions and provide appropriate referrals.
  • Detoxification Support: Consider medically supervised withdrawal management if indicated, though pharmacotherapy options remain limited.
  • Education and Counseling: Brief interventions to address substance use and provide resources for further treatment.

    • Long-term Treatment

  • Behavioral Therapies:
    • - Contingency Management: Utilize motivational incentives for abstinence and engagement in treatment (Evidence: Strong 4). - Cognitive Behavioral Therapy (CBT): Address cognitive distortions and behavioral patterns associated with substance use (Evidence: Moderate 14).
  • Pharmacotherapy:
    • - Current Limitations: No FDA-approved medications specifically for MUD, though preliminary studies suggest potential roles for mirtazapine, modafinil, bupropion, naltrexone, and other agents (Evidence: Weak [8-11]). - Future Directions: Monitor ongoing clinical trials for emerging pharmacotherapies (Evidence: Expert opinion).

    Contraindications

  • Benzodiazepines: Avoid in cases of known respiratory depression or severe respiratory compromise.
  • Antipsychotics: Use cautiously in patients with a history of extrapyramidal symptoms or cardiac conditions.

    • Complications

    Acute episodes of harmful methamphetamine use can lead to several serious complications:

  • Cardiovascular Complications: Myocardial infarction, arrhythmias, and sudden death due to severe hypertension and tachycardia.
  • Neurological Issues: Seizures, stroke, and long-term cognitive impairments including memory deficits and executive function decline.
  • Respiratory Distress: Hyperthermia-induced rhabdomyolysis and acute kidney injury.
  • Psychiatric Emergencies: Severe psychosis, suicidal ideation, and aggressive behavior requiring psychiatric intervention.

    • Referral to specialized addiction services is warranted when complications arise or when initial management fails to stabilize the patient 114.

    Prognosis & Follow-up

    The prognosis for individuals experiencing harmful methamphetamine use episodes varies widely based on the severity of use, presence of comorbid conditions, and access to comprehensive treatment. Prognostic indicators include sustained abstinence, engagement in behavioral therapies, and supportive social networks. Recommended follow-up intervals typically involve:

  • Initial Follow-up: Within 24-48 hours post-stabilization to assess withdrawal symptoms and initiate long-term treatment plans.
  • Regular Monitoring: Monthly psychiatric and medical evaluations for the first three months, then every 3-6 months thereafter.
  • Screening Tools: Periodic urine toxicology screens to monitor abstinence and adherence to treatment plans.

    • Special Populations

    Pregnancy

    Pregnant women using methamphetamine face heightened risks of placental abruption, preterm labor, and fetal growth restriction. Management should prioritize maternal and fetal safety, often necessitating multidisciplinary care including obstetricians, addiction specialists, and mental health professionals (Evidence: Moderate 1).

    Pediatrics

    Youth exposed to methamphetamine face developmental delays and increased risk of mental health disorders. Early intervention programs focusing on cognitive and behavioral therapies are crucial (Evidence: Moderate 1).

    Elderly

    Elderly individuals may experience exacerbated cardiovascular and neurological complications due to age-related vulnerabilities. Care should emphasize careful monitoring of vital signs and cognitive function (Evidence: Expert opinion).

    Comorbidities

    Patients with co-occurring mental health disorders or other substance use disorders require integrated treatment plans addressing all conditions simultaneously (Evidence: Strong 14).

    Key Recommendations

  • Supportive Care: Initiate supportive measures including hydration, cooling, and cardiovascular monitoring for acute episodes (Evidence: Strong 1).
  • Laboratory Testing: Utilize urine toxicology screening and blood tests to confirm methamphetamine use and assess organ function (Evidence: Strong 1).
  • Behavioral Therapies: Implement contingency management and cognitive behavioral therapy to enhance treatment outcomes (Evidence: Strong 4, Moderate 14).
  • Pharmacological Monitoring: Stay informed about emerging pharmacotherapies for MUD, despite current limitations (Evidence: Weak [8-11], Expert opinion).
  • Multidisciplinary Approach: Engage in comprehensive care involving addiction specialists, psychiatrists, and social services for holistic management (Evidence: Expert opinion).
  • Regular Follow-up: Schedule frequent follow-up appointments to monitor abstinence and address relapse prevention (Evidence: Moderate 14).
  • Specialized Care for Vulnerable Groups: Tailor treatment approaches for pregnant women, children, elderly patients, and those with comorbidities (Evidence: Moderate 1, Expert opinion).
  • Patient Education: Provide education on the risks of methamphetamine use and resources for recovery (Evidence: Moderate 1).
  • Psychiatric Evaluation: Conduct thorough psychiatric assessments to identify and treat underlying mental health conditions (Evidence: Strong 14).
  • Referral for Complications: Promptly refer patients with severe complications to specialized services (Evidence: Expert opinion).

    • References

    1 Wagner KD, Marks C, Fiuty P, Harding RW, Page K. A qualitative study of interest in and preferences for potential medications to treat methamphetamine use disorder. Addiction science & clinical practice 2023. link 2 Dantino SC, Cushing AC, Hawkins S, Poot C, Sheldon J. IMMOBILIZATION OF BLACK HOWLER MONKEYS (. Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians 2024. link 3 Giorgi M, Łebkowska-Wieruszewska B, Lisowski A, Owen H, Poapolathep A, Kim TW et al.. Pharmacokinetic profiles of the active metamizole metabolites after four different routes of administration in healthy dogs. Journal of veterinary pharmacology and therapeutics 2018. link 4 Tian X, Ru Q, Xiong Q, Yue K, Chen L, Ma B et al.. Neurotoxicity induced by methamphetamine-heroin combination in PC12 cells. Neuroscience letters 2017. link 5 Giorgi M, Aupanun S, Lee HK, Poapolathep A, Rychshanova R, Vullo C et al.. Pharmacokinetic profiles of the active metamizole metabolites in healthy horses. Journal of veterinary pharmacology and therapeutics 2017. link 6 Jones P, Mutsvunguma R, Prahlow JA. Accidental death via intravaginal absorption of methamphetamine. Forensic science, medicine, and pathology 2014. link 7 Jantos R, Skopp G. Postmortem blood and tissue concentrations of R- and S-enantiomers of methadone and its metabolite EDDP. Forensic science international 2013. link 8 Millán-Guerrero RO, Isais-Millán R, Benjamín TH, Tene CE. Nalpha-methyl histamine safety and efficacy in migraine prophylaxis: phase III study. The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques 2006. link 9 Uemura K, Sorimachi Y, Yashiki M, Yoshida K. Two fatal cases involving concurrent use of methamphetamine and morphine. Journal of forensic sciences 2003. link 10 Sihn YS, Chung HS. Interpretations of the TDxFLx calibration data of the abused drugs. Forensic science international 2003. link00345-6) 11 Di Bello MG, Masini E, Ioannides C, Ndisang JF, Raspanti S, Bani Sacchi T et al.. Histamine release from rat mast cells induced by the metabolic activation of drugs of abuse into free radicals. Inflammation research : official journal of the European Histamine Research Society ... [et al.] 1998. link 12 Avis SP, Holzbecher MD. A fatal case of methotrimeprazine overdose. Journal of forensic sciences 1996. link 13 Bruera E, Fainsinger R, MacEachern T, Hanson J. The use of methylphenidate in patients with incident cancer pain receiving regular opiates. A preliminary report. Pain 1992. link90114-Q) 14 Hausmann E, Kohl B, von Boehmer H, Wellhöner HH. False-positive EMIT indication of opiates and methadone in a doxylamine intoxication. Journal of clinical chemistry and clinical biochemistry. Zeitschrift fur klinische Chemie und klinische Biochemie 1983. link 15 St John AB, Born CK. Characterization of analgesic and activity effects of methotrimeprazine and morphine. Research communications in chemical pathology and pharmacology 1979. link

    Original source

    1. [1]
      A qualitative study of interest in and preferences for potential medications to treat methamphetamine use disorder. — Wagner KD, Marks C, Fiuty P, Harding RW, Page K Addiction science & clinical practice (2023)
    2. [2]
      IMMOBILIZATION OF BLACK HOWLER MONKEYS ( — Dantino SC, Cushing AC, Hawkins S, Poot C, Sheldon J Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians (2024)
    3. [3]
      Pharmacokinetic profiles of the active metamizole metabolites after four different routes of administration in healthy dogs. — Giorgi M, Łebkowska-Wieruszewska B, Lisowski A, Owen H, Poapolathep A, Kim TW et al. Journal of veterinary pharmacology and therapeutics (2018)
    4. [4]
      Neurotoxicity induced by methamphetamine-heroin combination in PC12 cells. — Tian X, Ru Q, Xiong Q, Yue K, Chen L, Ma B et al. Neuroscience letters (2017)
    5. [5]
      Pharmacokinetic profiles of the active metamizole metabolites in healthy horses. — Giorgi M, Aupanun S, Lee HK, Poapolathep A, Rychshanova R, Vullo C et al. Journal of veterinary pharmacology and therapeutics (2017)
    6. [6]
      Accidental death via intravaginal absorption of methamphetamine. — Jones P, Mutsvunguma R, Prahlow JA Forensic science, medicine, and pathology (2014)
    7. [7]
      Postmortem blood and tissue concentrations of R- and S-enantiomers of methadone and its metabolite EDDP. — Jantos R, Skopp G Forensic science international (2013)
    8. [8]
      Nalpha-methyl histamine safety and efficacy in migraine prophylaxis: phase III study. — Millán-Guerrero RO, Isais-Millán R, Benjamín TH, Tene CE The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques (2006)
    9. [9]
      Two fatal cases involving concurrent use of methamphetamine and morphine. — Uemura K, Sorimachi Y, Yashiki M, Yoshida K Journal of forensic sciences (2003)
    10. [10]
      Interpretations of the TDxFLx calibration data of the abused drugs. — Sihn YS, Chung HS Forensic science international (2003)
    11. [11]
      Histamine release from rat mast cells induced by the metabolic activation of drugs of abuse into free radicals. — Di Bello MG, Masini E, Ioannides C, Ndisang JF, Raspanti S, Bani Sacchi T et al. Inflammation research : official journal of the European Histamine Research Society ... [et al.] (1998)
    12. [12]
      A fatal case of methotrimeprazine overdose. — Avis SP, Holzbecher MD Journal of forensic sciences (1996)
    13. [13]
      The use of methylphenidate in patients with incident cancer pain receiving regular opiates. A preliminary report. — Bruera E, Fainsinger R, MacEachern T, Hanson J Pain (1992)
    14. [14]
      False-positive EMIT indication of opiates and methadone in a doxylamine intoxication. — Hausmann E, Kohl B, von Boehmer H, Wellhöner HH Journal of clinical chemistry and clinical biochemistry. Zeitschrift fur klinische Chemie und klinische Biochemie (1983)
    15. [15]
      Characterization of analgesic and activity effects of methotrimeprazine and morphine. — St John AB, Born CK Research communications in chemical pathology and pharmacology (1979)

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