Mood stabilizers ranked for bipolar disorder
Lithium, valproate, lamotrigine, and second-generation antipsychotics as mood stabilizers. Which to use for acute mania vs depression vs maintenance, side effect trade-offs, and evidence base for each.
By episode phase
Acute mania:
- Lithium (first-line for classic euphoric mania)
- Valproate (first-line for mixed and dysphoric mania)
- Antipsychotics (olanzapine, risperidone, quetiapine, aripiprazole, ziprasidone, cariprazine, asenapine) all effective
- Combination (lithium plus antipsychotic, or valproate plus antipsychotic) often used for severe
Acute bipolar depression:
- Quetiapine (first-line, FDA-approved for bipolar I and II depression)
- Lurasidone (FDA-approved bipolar I depression)
- Cariprazine (FDA-approved bipolar I depression)
- Lumateperone (Caplyta, FDA-approved bipolar I and II depression)
- Olanzapine-fluoxetine combination (FDA-approved but weight gain limits use)
- Lithium (moderate evidence)
- Lamotrigine (some evidence, particularly for maintenance)
Maintenance:
- Lithium (strongest evidence, particularly for classic bipolar and for suicide reduction)
- Valproate
- Lamotrigine (preferred for maintenance in depression-predominant bipolar)
- Quetiapine
- Aripiprazole, cariprazine
- Antipsychotic LAIs (aripiprazole once monthly, paliperidone, risperidone; see LAIs guide)
Individual drug profiles
Lithium:
- Reference standard for bipolar I maintenance
- Specifically shown to reduce suicide risk
- Narrow therapeutic index (target 0.6 to 1.0 mEq/L for maintenance, 0.8 to 1.2 for acute)
- Requires lithium levels, thyroid, renal function, calcium monitoring
- Interactions: NSAIDs (see lithium plus NSAIDs), thiazide diuretics, ACE inhibitors, dehydration
- Side effects: tremor, weight gain, hair loss (see hair loss page), polyuria, hypothyroidism, hyperparathyroidism, cognitive slowing at higher levels
- Renal effects with long-term use
Valproate (Depakote):
- Effective for acute mania and mixed states
- Once daily or twice daily
- Level monitoring (50 to 125 mcg/mL)
- Absolutely avoid in pregnancy (major neural tube defects, developmental delay)
- Side effects: weight gain (substantial), hair loss (moderate), sedation, tremor, hepatotoxicity (rare), thrombocytopenia, pancreatitis
- Not preferred in women of childbearing age
Lamotrigine (Lamictal):
- Preferred for bipolar maintenance particularly with depressive symptoms
- Slow titration required over 6 weeks to prevent Stevens-Johnson syndrome
- Not effective for acute mania
- Rash concern (SJS/TEN), higher risk with concurrent valproate
- Well tolerated once stable
- Cognitive effects minimal
Second-generation antipsychotics:
- Quetiapine: broad utility (mania, depression, maintenance)
- Lurasidone: bipolar depression, minimal weight gain
- Cariprazine: bipolar depression, activating profile
- Lumateperone: bipolar depression (see Cobenfy state of practice for related non-D2 approach)
- Aripiprazole: mania, maintenance
- Olanzapine: mania and depression but weight gain limits chronic use
Comparison by side effect profile
Weight gain: highest with olanzapine, valproate; moderate with quetiapine, risperidone; lower with lamotrigine, lithium, aripiprazole, cariprazine, lurasidone, lumateperone.
Cognitive effects: lithium at higher levels, valproate. Lamotrigine and modern atypicals generally less.
Hair loss: valproate, lithium. See hair loss page.
Sexual side effects: relatively low for most mood stabilizers vs SSRIs.
Pregnancy safety: lamotrigine has best data; lithium has some data (cardiac defect concern); valproate avoided; antipsychotics variable. See antidepressants safest in pregnancy for parallel discussion.
Metabolic: olanzapine and quetiapine highest; lithium some; other antipsychotics variable.
QT prolongation: quetiapine and lithium at higher levels. See QTc page.
When to use which
Classic bipolar I with clear manic episodes: lithium first, add antipsychotic for acute mania if needed.
Bipolar depression predominant: lamotrigine for maintenance, quetiapine or lurasidone or cariprazine for acute depression.
Rapid cycling: lithium plus valproate combinations common, avoid antidepressants that may cycle-worsen.
Mixed states: valproate or antipsychotic more than lithium.
Bipolar II: quetiapine has strong evidence; lamotrigine for maintenance.
Pregnancy planning: lamotrigine preferred; lithium acceptable with cardiac monitoring; valproate avoided.
Common questions
Is lithium still first-line? Yes for classic bipolar I maintenance and for suicide risk reduction. Requires monitoring commitment. Some patients cannot tolerate or accept ongoing lab draws.
Which mood stabilizer causes the least weight gain? Lamotrigine, lurasidone, cariprazine, aripiprazole, and lumateperone have the least weight gain. Lithium and valproate cause substantial weight gain.
Which is safest in pregnancy? Lamotrigine has the best data. Lithium is used with cardiac monitoring. Valproate is contraindicated due to major fetal risks. Antipsychotics vary.
Can I take an antidepressant with my mood stabilizer? For bipolar II, sometimes. For bipolar I, generally no because of mania risk. If used, must be paired with adequate mood stabilizer. Not universally recommended.
How long should mood stabilizer treatment continue? For a first manic episode with good recovery, at least 1 to 2 years. For recurrent bipolar disorder, often lifelong. Discontinuation carries substantial relapse risk.
Should I get a lithium level after every dose change? Yes, 5 to 7 days after any change. Once stable, every 3 to 6 months plus with any change in dose, other meds, or clinical status.
Sources
- Yatham LN, Kennedy SH, Parikh SV, et al. Canadian Network for Mood and Anxiety Treatments (CANMAT) and International Society for Bipolar Disorders (ISBD) 2018 guidelines. Bipolar Disord. 2018;20(2):97-170.
- Cipriani A, Hawton K, Stockton S, Geddes JR. Lithium in the prevention of suicide in mood disorders: updated systematic review and meta-analysis. BMJ. 2013;346:f3646.
- Miura T, Noma H, Furukawa TA, et al. Comparative efficacy and tolerability of pharmacological treatments in the maintenance treatment of bipolar disorder: a systematic review and network meta-analysis. Lancet Psychiatry. 2014;1(5):351-359.
- FDA prescribing information for lithium, valproate, lamotrigine, and each second-generation antipsychotic.
THE KNOWLEDGE PATH
Walk this topic outward.
- GUIDE Mood stabilizers ranked for bipolar disorder (current)
- CLASS SSRIs
- MEDICATION Sertraline (Zoloft)
- CONDITION Major Depressive Disorder (on Shrinkopedia)
- CARE Depression care at shrinkMD
The Knowledge Path is a curated walk. Every step is one decision away from the next.
Managing a medication needs a prescriber
Any psychiatric medication has to be started and adjusted by a clinician who can follow you over time. If you don't have a prescriber, our guides section explains the options, including in-person care and telepsychiatry, and how to choose between them.