Pharm
Lithium Carbonate
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Lithium Carbonate
, Lithium, Eskalith, Lithobid, Lithium Compound, Lithium Salt
See Also
Lithium Toxicity
Indication
Bipolar Disorder
History
Lithium has been used since the 1800s as a treatment for gout and
Seizure Disorder
and as of 1900s for mania
Contraindications
Pregnancy
Associated with
Ebstein Anomaly
when exposure in first trimester
Mechanism
May increase CNS
Serotonin
levels
Neuroprotective effect
Decreases intracellular
Inositol
monophosphate concentrations
Mood stabilization effect
Inhibits Glycogen Synthase Kinase 3 (GSK3B)
Enzyme involved in
Neuron
al development and
Energy Metabolism
GSK3B overexpression may be associated with
Bipolar Disorder
Pharmacokinetics
Lithium Carbonate is a simple salt that is excreted and not metabolized
Lithium is an alkali metal (the smallest metal, having atomic number 3)
Steady state reached in 5 days
Check Lithium levels 5 days after starting dose or changing dose
Therapeutic Trough levels
Acute mania: 1.0 to 1.2 meq/L
Maintenance
Bipolar Disorder
: 0.8 to 1.0 meq/liter
Increasing dose 300 mg/day raises level 0.2 meq/L
Excretion
Renal excretion (and 60% reabsorbed at proximal tubules)
Preparations
Lithium Carbonate (immediate release)
Lithobid (sustained release)
Eskalith (sustained release)
Dosing
Blood levels peak 1-2 hours after immediate release products at therapeutic dose (4-6 hours after sustained release)
Effective dose: 900 to 1800 mg per day divided twice daily (or 3-4 times daily)
Start: 300 mg orally twice daily
May adjust dose every 2-3 days as tolerated
Adverse Effects
Polyuria
Hypothyroidism
Often reversible on stopping Lithium
Higher
Prevalence
in women and with increasing age
Weight gain
Fine
Tremor
Withdrawal symptoms on stopping
More common than with
Valproate
or
Lamotrigine
Adverse Effects
Toxicity
Nausea
and
Vomiting
Diarrhea
Ataxia
Coma
Death
Toxicity
See
Lithium Toxicity
Precaution
Toxicity is dose dependent and
Overdose
can be lethal
Pregnancy
Highly
Teratogen
ic
Cerebellar Signs or symptoms
Mechanism
Poor therapeutic window
Renal excretion
Drug Interactions
Diuretic
s
NSAID
s
ACE Inhibitor
s
Monitoring
Serum Lithium level
Day 5 after starting Lithium
Then every 1-2 weeks initially
Then every 3-6 months
Also check serum levels before and 5 days after dose changes
Other labs
Schedule
Baseline
Month 3
Month 6
Every 6 to 12 months thereafter
Thyroid Stimulating Hormone
(TSH)
Renal Function
tests
Serum Creatinine
Blood Urea Nitrogen
References
Perrone and Chatterjee (2018) UpToDate, accessed 8/20/2018
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