The classic sleep herb, two years to a crop, and mixed trial results worth knowing before you plant. — Valeriana officinalis
remedyValerian Valeriana officinalis — hand-drawn plate, stylised. Not for identification — use a field guide and verify with a second source before eating any wild plant.
Valerian (Valeriana officinalis) is the most traditional sedative herb in the European pharmacopoeia, grown for its root and used for sleep.
The evidence is mixed, and honest use says so. Trials of valerian for insomnia have produced inconsistent results: some show improvements in sleep latency and quality, others show no difference from placebo. The effect, where present, is mild, and it appears to build over weeks rather than acting acutely like a hypnotic.
The comparison that matters most.Cognitive behavioural therapy for insomnia (CBT-I) substantially outperforms valerian, and outperforms sleeping tablets. A handbook that recommends valerian for insomnia without saying this is misleading. Valerian is a mild adjunct for someone already doing the behavioural work.
What it does do reliably. Valerian is sedating enough to add to alcohol and to sedative drugs, which is both its mechanism and its main interaction risk.
Growing it is a two-to-three-year commitment for a root, which is a lot of bed space for a mild effect. The smell of the dried root is strong and characteristic; it is not spoilage — cats find it interesting for the same reason they find catnip interesting.
What the studies found
Meta-Analysis2022Pharmacological research
Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis.
However, these results should be considered preliminary because of the unconvincing sample sizes, together with the potential effectiveness of placebos.
[Insomnias. II. Pharmacological and psychotherapeutic treatment options].
Studies on the combination treatment of insomnia with hypnotics and cognitive behavioural therapy up to now were not able to show a superiority of the combination treatment versus monotreatment with behavioural therapy or hypnotics.
| | |
|---|---|
| Life | Perennial |
| Propagation | Division is much faster than seed; seed needs stratification |
| Light | Sun to part shade |
| Soil | Moist, reasonably fertile |
| Spacing | 45 cm |
| Harvest root | End of second or third season, autumn |
| Dry | 45-55 C, sliced — the root is dense and moulds whole |
| Note | The strong smell is normal |
Roots spread; give it room or a barrier
Wash, slice, dry until snapping
Store in dark glass, well sealed — the smell is penetrating
Divide every few years
Preparation
Root tea — 1-2 teaspoons dried root, steeped 10-15 minutes, taken 30-60 minutes before bed. The smell is strong; many people blend it.
Tincture — the more palatable form; root in alcohol.
Capsules — commercial standardised extracts; what most trials used.
Combination — often blended with lemon balm, passionflower and hops for sleep.
The better first step — the behavioural programme for insomnia, which has stronger evidence than any herb here.
Cautions and interactions
Valerian adds to the sedation of alcohol, benzodiazepines and other sedatives. Do not combine and drive.
Do not stop a prescribed sedative to take valerian.
Avoid in pregnancy and breastfeeding without advice.
May affect liver enzymes — rare liver injury has been reported.
Not for children without advice.
When this is not a self-care problem — get help
Falling asleep while driving or severe daytime sleepiness — stop driving and get assessed.
Loud snoring with witnessed pauses in breathing — assessment for sleep apnoea, which no herb treats.
Jaundice, dark urine or right-upper abdominal pain while taking valerian — stop and get assessed.
Known interactions
Additive sedation with alcohol, benzodiazepines, opioids and antihistamines. Possible CYP3A4 interaction.
Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis. Pharmacological research 2022; doi:10.1016/j.phrs.2022.106204 PubMed 35378276
Valerian Root in Treating Sleep Problems and Associated Disorders-A Systematic Review and Meta-Analysis. Journal of evidence-based integrative medicine 2020; doi:10.1177/2515690X20967323 PubMed 33086877
Herbal medicine for insomnia: A systematic review and meta-analysis. Sleep medicine reviews 2015; doi:10.1016/j.smrv.2014.12.003 PubMed 25644982
[Insomnias. II. Pharmacological and psychotherapeutic treatment options]. Der Nervenarzt 2009; doi:10.1007/s00115-009-2746-9 PubMed 19506825
Valerian for sleep: a systematic review and meta-analysis. The American journal of medicine 2006; doi:10.1016/j.amjmed.2006.02.026 PubMed 17145239
Herbal medications for common ailments in the elderly. Drugs & aging 1999; doi:10.2165/00002512-199915060-00002 PubMed 10641953