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Lithium and ECT--concurrent use still demands attention: three case reports.
Alexander Sartorius1, Joachim Wolf, Fritz A Henn
1Central Institute of Mental Health, J5, 68159 Mannheim, Germany. sartorius@web.de
Summary
Electroconvulsive therapy (ECT) effectively treats bipolar disorder and depression. However, severe side effects from lithium, even at low levels, can occur during concurrent ECT treatment, challenging established safety protocols.
Area of Science:
- Neuroscience
- Psychiatry
- Pharmacology
Background:
- Electroconvulsive therapy (ECT) is a primary treatment for severe bipolar disorder and recurrent major depressive episodes.
- Prophylactic therapy for recurrent mood disorders often involves antidepressants, with or without lithium, as maintenance ECT is not well-established.
- The concurrent use of lithium and ECT raises questions regarding safety and potential interactions, especially when initiating lithium during an ECT course.
Observation:
- This report details three cases of severe lithium-induced side effects during ECT.
- These adverse events, including prolonged seizures, serotonin syndrome, and focal seizures, occurred despite subtherapeutic lithium serum levels.
- The patients undergoing ECT experienced no complications related to the ECT procedure itself.
Findings:
- Severe adverse events associated with lithium can manifest even at subtherapeutic serum concentrations during ECT.
- The concurrent administration of lithium and ECT may pose risks not fully elucidated by previous studies suggesting no negative interactions.
- Reported cases highlight the potential for serious, unexpected lithium toxicity in the context of ECT.
Implications:
- Clinicians must exercise caution when considering concurrent lithium and ECT treatment, even with low lithium levels.
- The findings suggest a need for re-evaluation of safety guidelines for combined lithium-ECT therapy.
- Further research into the mechanisms, potentially involving blood-brain barrier disturbances, is warranted to understand and mitigate these severe side effects.