When a seizure is not a real seizure!

Area of Science:

• Cardiology
• Pharmacology
• Neurology

Background:

• Methadone is a widely used opioid agonist therapy for opioid use disorder.
• Cardiac arrhythmias, including Torsades de Pointes (TdP), are known but uncommon adverse effects of methadone.
• Substance abusers represent a complex patient population with unique physiological responses to medications.

Observation:

• Two cases of Torsades de Pointes (TdP) were observed in individuals undergoing methadone treatment.
• The clinical presentation in both cases mimicked convulsive seizures.
• These presentations were noted in patients with a history of substance abuse.

Findings:

• Methadone administration was directly linked to the development of Torsades de Pointes in these patients.
• The cardiac event presented atypically, resembling neurological seizure activity.
• This highlights a potential diagnostic challenge in patients on methadone therapy.

Implications:

• Clinicians must consider methadone-induced Torsades de Pointes (TdP) in substance abusers presenting with seizure-like activity.
• Awareness of atypical presentations is crucial for timely diagnosis and management of methadone-related cardiac events.
• This underscores the importance of cardiac monitoring in patients receiving methadone, especially those with risk factors.