Kava for Hyperarousal and Cognitive Insomnia
ABased on 23 studies (4 meta-analyses, 1 RCT) with 2,043 total participants. Results are mixed across studies.
The Bottom Line
Based on 23 studies (4 meta-analyses, 1 RCT) with 2,043 total participants. Results are mixed across studies.
Key Study Findings
Population: 41-year-old Australian woman consuming kava for anxiety and insomnia
Population: 45-year-old man with kava and kratom withdrawal
Population: Adult smokers (trial protocol)
Population: Animal model
Population: Insomnia patients
Population: Kava users
Key Statistics
23
Studies
2043
Participants
Mixed
Grade
Referenced Papers
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 | 1 |
| AB-free kava extract | -- | Mixed | -- |
| None | -- | Positive | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| not specified | -- | 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 Hyperarousal and Cognitive Insomnia?
How much Kava should I take for Hyperarousal and Cognitive Insomnia?
Are there side effects of Kava?
How strong is the evidence for Kava and Hyperarousal and Cognitive Insomnia?
Related Evidence
Other ingredients for Hyperarousal and Cognitive Insomnia
Kava for other conditions
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.