Kava for Insomnia

Based on 34 studies (8 meta-analyses, 1 RCT) with 4,679 total participants. Results are mixed across studies.

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The Bottom Line

Based on 34 studies (8 meta-analyses, 1 RCT) with 4,679 total participants. Results are mixed across studies.

Key Study Findings

Case Reports n=1 6 weeks

Diagnosing Acute Kava Dermopathy: A Case Report of a Characteristic Cutaneous Eruption.

Dose: None vs: None Outcome: acute kava dermopathy with sebaceous gland necrosis Effect: None None

Population: 41-year-old Australian woman consuming kava for anxiety and insomnia

Review

Integrative sleep management: from molecular pathways to conventional and herbal treatments.

Dose: None vs: Placebo Effect: None None

Case Reports n=1 Open-label

Severe kava withdrawal managed with phenobarbital.

Dose: None vs: None Outcome: Resolution of kava withdrawal symptoms Effect: None None

Population: 45-year-old man with kava and kratom withdrawal

narrative review

Herbal and Natural Supplements for Improving Sleep: A Literature Review.

Dose: varies by supplement vs: Placebo Effect: None None

Other Double-blind

The potential of AB-free kava in enabling tobacco cessation via management of abstinence-related stress and …

Dose: AB-free kava extract vs: Placebo Outcome: Tobacco cessation via stress/insomnia management Effect: None None

Population: Adult smokers (trial protocol)

systematic review n=17

Identifying complementary and alternative medicine recommendations for insomnia treatment and care: a systematic review and …

Dose: various vs: Placebo Effect: None None

Key Statistics

Studies

4679

Participants

↔

Mixed

Grade

Referenced Papers

Diagnosing Acute Kava Dermopathy: A Case Report of a Characteristic Cutaneous Eruption. Case Report

The Medical journal … 2026

Integrative sleep management: from molecular pathways to conventional and herbal treatments. Review

Naunyn-Schmiedeberg's archives of … 2025 4 citations

Severe kava withdrawal managed with phenobarbital. Case Report

The American journal … 2025 1 citations

Herbal and Natural Supplements for Improving Sleep: A Literature Review. Other

Psychiatry investigation 2024 24 citations

The potential of AB-free kava in enabling tobacco cessation via management of abstinence-related stress and insomnia: study protocol for a … Other

BMC complementary medicine … 2024 1 citations

Identifying complementary and alternative medicine recommendations for insomnia treatment and care: a systematic review and critical assessment of comprehensive clinical … Systematic Review

Frontiers in public … 2023 13 citations

Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis. Meta-Analysis

Pharmacological research 2022 51 citations

An Updated Review on the Psychoactive, Toxic and Anticancer Properties of Kava. Review

Journal of clinical … 2022 27 citations

The Impact of Complementary and Alternative Medicine on Insomnia: A Systematic Review. Review

Cureus 2022 17 citations

Acute oral toxicity, antinociceptive and antimicrobial activities of kava dried extracts and synthetic kavain. Other

Natural product research 2022 3 citations

Calm Down With Kava: What Clinicians Need to Know. Other

Journal of psychosocial … 2022 2 citations

Nutraceuticals for Sleep Disorders. Review

Combinatorial chemistry & … 2021 16 citations

The Veterans Administration and Department of Defense clinical practice guidelines for the diagnosis and management of sleep disorders: what does … Other

Journal of clinical … 2020 17 citations

Enzymes and Pathways of Kavain Bioactivation and Biotransformation. Other

Chemical research in … 2019 6 citations

GABA-modulating phytomedicines for anxiety: A systematic review of preclinical and clinical evidence. Systematic Review

Phytotherapy research : … 2018 95 citations

Natural Products from Single Plants as Sleep Aids: A Systematic Review. Systematic Review

Journal of medicinal … 2018 19 citations

Herbal medicine for insomnia: A systematic review and meta-analysis. Meta-Analysis

Sleep medicine reviews 2015 152 citations

Psychophytomedicine: an overview of clinical efficacy and phytopharmacology for treatment of depression, anxiety and insomnia. Review

Holistic nursing practice 2014 10 citations

Toxicokinetics of kava. Other

Advances in pharmacological … 2011 79 citations

Nutritional and herbal supplements for anxiety and anxiety-related disorders: systematic review. Systematic Review

Nutrition journal 2010 187 citations

Flavokawain B, the hepatotoxic constituent from kava root, induces GSH-sensitive oxidative stress through modulation of IKK/NF-kappaB and MAPK signaling pathways. Other

FASEB journal : … 2010 110 citations

Formulations of dietary supplements and herbal extracts for relaxation and anxiolytic action: Relarian. Review

Medical science monitor … 2009 85 citations

Medicinal plants for insomnia: a review of their pharmacology, efficacy and tolerability. Review

Journal of psychopharmacology … 2005 176 citations

An internet-based randomized, placebo-controlled trial of kava and valerian for anxiety and insomnia. RCT

Medicine 2005 128 citations

Effects of kava-kava extract on the sleep-wake cycle in sleep-disturbed rats. Other

Psychopharmacology 2005 36 citations

Oral nonprescription treatment for insomnia: an evaluation of products with limited evidence. Review

Journal of clinical … 2005

Safety and efficacy of herbal sedatives in cancer care. Review

Integrative cancer therapies 2004 59 citations

Saccade and cognitive impairment associated with kava intoxication. Other

Human psychopharmacology 2003 45 citations

Anxiety, depression, and insomnia. Review

Primary care 2002 43 citations

Over-the-counter sleeping pills: a survey of use in Hong Kong and a review of their constituents. Review

General hospital psychiatry 2002 38 citations

Kava and valerian in the treatment of stress-induced insomnia. Other

Phytotherapy research : … 2001 74 citations

Stress-induced insomnia treated with kava and valerian: singly and in combination. Other

Human psychopharmacology 2001 52 citations

Herbs and nutrients in the treatment of depression, anxiety, insomnia, migraine, and obesity. Other

Journal of psychiatric … 2001 42 citations

Dietary supplements and natural products as psychotherapeutic agents. Review

Psychosomatic medicine 1999 136 citations

[Hematogenous contact eczema cause by phytogenic drugs exemplified by kava root extract]. Case Report

Der Hautarzt; Zeitschrift … 1996 22 citations

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Commonly Used Dosages

sleep:: 120-250 mg kavalactones/day, 1-2 hrs before bed

Upper limit: 250 mg kavalactones/day (European guidelines); limited to 3 months continuous use

Dosages Studied in Research

Dosage	Duration	Effect	N
None	6 weeks	Negative	1
None	--	Positive	--
None	--	Positive	1
varies by supplement	--	Positive	--
AB-free kava extract	--	Mixed	--
various	--	Mixed	17
None	--	Mixed	--
Various medicinal herbs: Silexan, Kava, Ginkgo biloba, Withania somnifera, Galphimia glauca, Passion	--	Positive	--

Best taken: 1-2 hours before bed; avoid daily use beyond 3 months without medical supervision

Safety & Side Effects

Reported Side Effects

⚠ Drowsiness and reduced coordination
⚠ Hepatotoxicity (rare but serious — consult healthcare provider)
⚠ Skin rash (kava dermopathy) with chronic high-dose use
⚠ GI discomfort

Known Interactions

● Alcohol — increased hepatotoxicity risk and CNS depression
● Hepatotoxic medications (acetaminophen, statins) — additive liver stress
● Benzodiazepines and sedatives — additive CNS depression
● CYP450 substrates (2E1, 1A2, 2D6) — kavalactones may inhibit metabolism
● Levodopa and dopaminergic drugs — kava may reduce efficacy

Tolerable upper intake: 250 mg kavalactones/day (European guidelines); limited to 3 months continuous use

Always consult your healthcare provider before starting any supplement.

Frequently Asked Questions

Does Kava help with Insomnia?

Based on 34 studies with 4,679 participants, there is strong evidence from multiple clinical trials that Kava may support Insomnia management. Our evidence grade is A (Strong Evidence).

How much Kava should I take for Insomnia?

Studies have used various dosages. A commonly studied range is 120-250 mg kavalactones/day, 1-2 hrs before bed. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Kava?

Reported side effects may include Drowsiness and reduced coordination, Hepatotoxicity (rare but serious — consult healthcare provider), Skin rash (kava dermopathy) with chronic high-dose use, GI discomfort. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Kava and Insomnia?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 34 peer-reviewed studies with 4,679 total participants. The overall direction of effect is mixed.

Related Evidence

Other ingredients for Insomnia

Melatonin A Valerian Root A CBD A Omega-3 Fatty Acids A Tryptophan A Vitamin D A

Kava for other conditions

Anxiety-Related Sleep Problems A Hyperarousal and Cognitive Insomnia A

Quick Verdict

Based on 34 studies (8 meta-analyses, 1 RCT) with 4,679 total participants. Results are mixed across studies.

Evidence Strength92%

High confidence

Study Breakdown

RCT (1)Meta (2)Other (31)

Compare Alternatives

See how other ingredients compare for this condition.

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Learn More

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.