Kava for Insomnia
A Strong Evidence Multiple large clinical trials consistently show significant benefits.Based on 34 studies (8 meta-analyses, 1 RCT) with 4,679 total participants. Results are mixed across studies.
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A
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
34
Studies
4679
Participants
↔
Mixed
A
Grade
Referenced Papers
The Medical journal …
2026
Naunyn-Schmiedeberg's archives of …
2025
4 citations
The American journal …
2025
1 citations
Psychiatry investigation
2024
24 citations
BMC complementary medicine …
2024
1 citations
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
Journal of clinical …
2022
27 citations
Cureus
2022
17 citations
Natural product research
2022
3 citations
Journal of psychosocial …
2022
2 citations
Combinatorial chemistry & …
2021
16 citations
Journal of clinical …
2020
17 citations
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
Sleep medicine reviews
2015
152 citations
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
FASEB journal : …
2010
110 citations
Medical science monitor …
2009
85 citations
Journal of psychopharmacology …
2005
176 citations
Medicine
2005
128 citations
Psychopharmacology
2005
36 citations
Oral nonprescription treatment for insomnia: an evaluation of products with limited evidence.
Review
Journal of clinical …
2005
Integrative cancer therapies
2004
59 citations
Human psychopharmacology
2003
45 citations
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
Phytotherapy research : …
2001
74 citations
Human psychopharmacology
2001
52 citations
Journal of psychiatric …
2001
42 citations
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
Kava for other conditions
References
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- [29] Michele M Larzelere et al.. Prim Care. 2002. Anxiety, depression, and insomnia. doi:10.1016/s0095-4543(01)00003-3 PubMed
- [30] Ka Fai Chung et al.. Gen Hosp Psychiatry. 2002. Over-the-counter sleeping pills: a survey of use in Hong Kong and a review of their constituents. doi:10.1016/s0163-8343(02)00210-4 PubMed
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- [32] David Wheatley. Hum Psychopharmacol. 2001. Stress-induced insomnia treated with kava and valerian: singly and in combination. doi:10.1002/hup.299 PubMed
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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.