Suspected Lithium Toxicity
Patient on lithium with concerning symptoms or elevated level
All Pathways
PsychiatryEmergency
Lithium Toxicity Management (EXTRIP Guidelines)
Lithium Toxicity Management (EXTRIP Guidelines): Suspected Lithium Toxicity → Recognize Clinical Features → Type of Toxicity? → Laboratory Evaluation → ...
Pathway Overview
14 steps
Algorithm Steps
14 total
01Start 02Action Recognize Clinical Features
Symptoms by severity
- MILD (1.5-2.5 mEq/L): Fine tremor, nausea, diarrhea, polyuria
- MODERATE (2.5-3.5): Coarse tremor, ataxia, confusion, slurred speech
- SEVERE (>3.5): Seizures, coma, cardiac arrhythmias, hyperthermia
- Chronic toxicity: May occur at lower levels, more severe neurologic
03Decision Type of Toxicity?
Acute vs. Chronic vs. Acute-on-Chronic
- ACUTE: Single ingestion, patient not previously on lithium
- CHRONIC: Accumulation over time (common - dehydration, NSAIDs, ACEi)
- ACUTE-ON-CHRONIC: Extra dose/ingestion in chronic user
04Action Laboratory Evaluation
Essential labs for management
- Serum lithium level (repeat q4h until stable)
- BMP (renal function critical)
- TSH (chronic users)
- ECG (T-wave changes, QT prolongation)
- Calcium (hypercalcemia can mimic)
- Serum osmolality
05Warning ⚠️ STOP Lithium
Discontinue lithium immediately
- Hold lithium
- Hold drugs that ↑ lithium (NSAIDs, ACEi, thiazides)
- Ensure adequate hydration
06Decision Severity Assessment
Based on level AND clinical status
07Action Mild Toxicity
Level 1.5-2.5 mEq/L, minimal symptoms
- IV NS to maintain euvolemia
- Monitor lithium levels q4-6h
- Hold nephrotoxic medications
- Supportive care
- Most resolve with fluids alone
08Action Monitoring & Complications
Watch for sequelae
- Serial neuro exams
- Lithium levels until <1.0 and stable
- Monitor renal function
- Watch for SILENT (Syndrome of Irreversible Lithium-Effectuated Neurotoxicity)
- Cognitive impairment may persist
09Outcome Recovery & Future Management
After stabilization
- Psychiatry consult for mood stabilizer alternatives
- If restarting lithium: lower dose, close monitoring
- Consider valproate, carbamazepine, or atypical antipsychotic
- Educate on risk factors (dehydration, NSAIDs, drug interactions)
10Action Moderate Toxicity
Level 2.5-3.5 mEq/L OR significant symptoms
- Aggressive IV NS
- ICU admission recommended
- Serial lithium levels q2-4h
- Monitor for deterioration
- Consider nephrology consult
11Decision Hemodialysis Indicated?
EXTRIP Criteria
- Lithium >4.0 mEq/L (acute ingestion)
- Lithium >2.5 mEq/L + impaired kidney function
- Lithium >2.5 mEq/L + severe neurotoxicity
- Any level with seizures, coma, life-threatening dysrhythmia
12Action Hemodialysis
Most effective elimination method
- Highly effective (lithium clearance 100-200 mL/min)
- Continue until level <1.0 mEq/L
- Recheck level 6 hours post-HD (rebound)
- May need repeat HD sessions
- CRRT alternative if HD not tolerated
- Path rejoins step 08Shared downstream outcome
13Warning ⚠️ Treatments NOT Effective
Common misconceptions
- Activated charcoal: Does NOT bind lithium
- Sodium polystyrene: NOT effective
- Forced diuresis: NOT recommended (risk of dehydration)
- Whole bowel irrigation: Only for acute ingestion of sustained-release
- Path rejoins step 08Shared downstream outcome
14Warning Severe Toxicity
Level >3.5 OR severe symptoms
- ICU admission
- Immediate nephrology consult
- Prepare for hemodialysis
- Seizure precautions
- Airway protection if obtunded
- Path rejoins step 11Shared downstream outcome
Guideline Source
EXTRIP Recommendations for Lithium Poisoning + BJPsych Advances Management Review
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Chronic toxicity can occur at 'therapeutic' levels
- Serum level may not reflect CNS concentration (especially chronic)
- Dialysis may need to be repeated due to redistribution
- Neurological sequelae possible even with treatment
Applicable Regions
USEUGlobal
Version 1Next review: 2027-01-11
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Frequently Asked Questions
What is the Lithium Toxicity Management (EXTRIP Guidelines)?
The Lithium Toxicity Management (EXTRIP Guidelines) is a emergency clinical algorithm for Psychiatry. It provides a structured decision tree to guide clinical decision-making, based on EXTRIP Recommendations for Lithium Poisoning + BJPsych Advances Management Review.
What guideline is the Lithium Toxicity Management (EXTRIP Guidelines) based on?
This algorithm is based on EXTRIP Recommendations for Lithium Poisoning + BJPsych Advances Management Review (DOI: 10.1192/bja.2022.7).
What are the limitations of the Lithium Toxicity Management (EXTRIP Guidelines)?
Known limitations include: Chronic toxicity can occur at 'therapeutic' levels; Serum level may not reflect CNS concentration (especially chronic); Dialysis may need to be repeated due to redistribution; Neurological sequelae possible even with treatment. Individual patient factors may require deviation from these recommendations.
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