Reviewed guidance
The EMA documents traditional use of valerian-root preparations for temporary mild nervous tension and to promote natural sleep. A Cochrane review found too little evidence to determine whether valerian treats anxiety disorders; this is indirect to situational stress and does not establish benefit for this ailment.
Optional traditional-use adjunct for temporary mild nervous tension or stress-related difficulty settling; evidence is insufficient for situational-stress symptom relief, and it is not a treatment for anxiety disorders, depression, insomnia requiring evaluation, or crisis.
How to use it: If used, follow the product label and choose a clearly identified valerian-root preparation; do not combine products or infer that a tea, tincture, extract, or capsule has the same effects as another form. Avoid using it as an immediate rescue treatment or to delay assessment when stress is persistent or impairing.
Valerian may cause drowsiness or other mild adverse effects. Avoid alcohol and use caution with sedatives, sleep medicines, or other sedating herbs; do not drive if drowsy. Long-term safety is uncertain. Avoid assuming safety in pregnancy or breastfeeding, and seek clinician advice for liver disease or concerning symptoms.
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
Cochrane Collaboration · 2006
"Since only one small study is currently available, there is insufficient evidence to draw any conclusions about the efficacy or safety of valerian as a treatment option for anxiety disorders."
European Medicines Agency · 2015
"A herbal medicine used for the temporary symptomatic relief of mild forms of stress and strains and to promote natural sleep."