Reviewed guidance
Small randomized trials and meta-analyses suggest some standardized ashwagandha extracts can modestly improve sleep, with larger effects reported in adults who already have insomnia. The evidence base is still small, preparations vary, and this does not establish that ashwagandha tea or an arbitrary powder amount has the same effect.
Optional short-term adjunct for adults with insomnia symptoms using a standardized ashwagandha root extract comparable to products studied for at least several weeks; not a replacement for cognitive behavioral therapy for insomnia.
How to use it: If considering ashwagandha for sleep, use a clearly labeled standardized root extract rather than translating trial doses into a homemade preparation. Persistent insomnia is better addressed with CBT-I, which has substantially stronger evidence and is recommended as first-line treatment.
Avoid ashwagandha during pregnancy and breastfeeding. It is not recommended around surgery or for people with autoimmune or thyroid disorders without clinician review. It can cause drowsiness, stomach upset, diarrhea, or vomiting; rare liver injury has been reported. Review use with a clinician if you take sedatives, anticonvulsants, thyroid medicines, immunosuppressants, diabetes medicines, or blood-pressure medicines.
Get medical care for symptoms that are severe, last longer than expected, get worse, or otherwise concern you.
Practical ways to use the ingredient may not provide the same form or amount discussed in the evidence.
Evidence transparency
U.S. Department of Veterans Affairs and Department of Defense
Current guideline context reinforces CBT-I-first management, OSA screening, and caution about commonly marketed sleep supplements.
PLoS ONE
Five randomized trials (400 participants) showed a small pooled sleep benefit, stronger in diagnosed insomnia and longer/higher-dose study subgroups; heterogeneity and few trials limit confidence.
Journal of Clinical Sleep Medicine
CBT-I is the strong first-line behavioral treatment for chronic insomnia; herbal adjuncts must not displace it.
Journal of Ethnopharmacology
Updated meta-analysis supports improvement in several sleep outcomes but remains based on a small evidence base with important heterogeneity.
National Center for Complementary and Integrative Health
NCCIH states that some ashwagandha preparations may be effective for insomnia and supplies the principal short-term safety and interaction boundaries used here.