Pharmacologic Treatment of Malignant Catatonia Without Electroconvulsive Therapy: A Case Report.

Malignant catatonia is a rare, life-threatening variant of catatonia requiring prompt treatment. Malignant catatonia is characterized by typical catatonia symptoms of psychomotor, neurologic, and behavioral changes complicated by autonomic instability, with an estimated mortality rate of 50% or more when untreated. Electroconvulsive therapy (ECT) is considered the definitive and most effective treatment for malignant catatonia, with minimal literature on the efficacy of pharmacological interventions alone. Timely access to life-saving ECT may be limited in some hospitals due to restrictive laws on the use of ECT when the patient is incapacitated or due to lack of treatment availability. This case report describes the successful pharmacologic treatment of a patient with malignant catatonia where ECT was unobtainable due to legal restrictions and lack of access to treatment. The patient was initially commenced on lorazepam but continued to deteriorate, subsequently developing complications of aspiration pneumonia and  colitis. The patient's malignant catatonia resolved with a combination of lorazepam, memantine, and a one-time dose of dantrolene. This complex case highlights the challenges of treating malignant catatonia in under-resourced systems or jurisdictions with restrictive ECT laws and adds additional data on the successful use of pharmacologic interventions for malignant catatonia where ECT is impractical or delayed.