Outcomes

What lithium actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Ease depression symptoms Large effect, needs confirmation

Lowers the weight of sadness, low energy, and emotional numbness over weeks.

6 meta-analyses n=290 10–1050 mg 3–78 wk #1/41

20363190·23453347·25326163·30457075 +2 more

large

6 meta-analyses n=290 Meta-analyzed

10–1050 mg

3–78 wk

#1 /41

Ease winter depression symptoms Large effect, needs confirmation

Compensates for the sunlight deficit when days get short.

6 meta-analyses n=290 10–1050 mg 3–78 wk #1/39

20363190·23453347·25326163·30457075 +2 more

large

6 meta-analyses n=290 Meta-analyzed

10–1050 mg

3–78 wk

#1 /39

Ease depression tied to chronic pain Large effect, needs confirmation

When pain loosens its grip, mood follows.

6 meta-analyses n=290 10–1050 mg 3–78 wk #1/39

20363190·23453347·25326163·30457075 +2 more

large

6 meta-analyses n=290 Meta-analyzed

10–1050 mg

3–78 wk

#1 /39

Calm manic episodes in bipolar Promising early signal

Reduces racing thoughts, agitation, and impulsive behavior during mania.

2 RCTs n=16 150–800 mg 1–12 wk

34059401·41276636

moderate

2 RCTs n=16

150–800 mg

1–12 wk

—

Improve everyday quality of life Not enough research

Fewer days where health problems dictate what you can and cannot do.

2 RCTs n=50 10–885 mg 3–78 wk

23453347·39356507

small

2 RCTs n=50

10–885 mg

3–78 wk

—

Ease behavioral symptoms in dementia Proven but unnoticeable

Less agitation, irritability, wandering, and nighttime restlessness.

2 meta-analyses n=566 150–600 mg 9–12 wk #2/3

21282779·34059401

trivial

2 meta-analyses n=566 Meta-analyzed

150–600 mg

9–12 wk

#2 /3

Outcome	Effect	Evidence	Dose	Weeks	Rank
Ease depression symptoms Large effect, needs confirmation	large	6 meta-analyses n=290 Meta-analyzed	10–1050 mg	3–78 wk	#1/41
Ease winter depression symptoms Large effect, needs confirmation	large	6 meta-analyses n=290 Meta-analyzed	10–1050 mg	3–78 wk	#1/39
Ease depression tied to chronic pain Large effect, needs confirmation	large	6 meta-analyses n=290 Meta-analyzed	10–1050 mg	3–78 wk	#1/39
Calm manic episodes in bipolar Promising early signal	moderate	2 RCTs n=16	150–800 mg	1–12 wk	—
Improve everyday quality of life Not enough research	small	2 RCTs n=50	10–885 mg	3–78 wk	—
Ease behavioral symptoms in dementia Proven but unnoticeable	trivial	2 meta-analyses n=566 Meta-analyzed	150–600 mg	9–12 wk	#2/3

Buy well

Recommended Lithium products

Real products that dose Lithium where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Lithium dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Risk profile

Adverse events and known drug interactions

Safety events

Depression with suicide attempt (serious adverse event) severe

Serious adverse event (any) severe

Congenital malformations (cardiac malformation; hypospadias with cryptorchidism) severe

Multiple myeloma severe

end_stage_renal_disease severe

weight increased severe

Transient lithium toxicity moderate

Hypotonia (mild) mild

Drug interactions

Diuretics major increases concentration

Antihypertensives major increases concentration

other major increases concentration

Ace Inhibitors And Arbs major increases concentration

Hydrochlorothiazide major increases concentration

Antithrombotic Agents moderate unknown

Clozapine moderate increases effect

Valproate (Reported Adverse Effect) moderate increases toxicity

Antipsychotics moderate additive

Levothyroxine moderate unknown

Sources

Generated August 14, 2026

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What lithium actually does, by outcome

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Adverse events and known drug interactions

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