Herbal Remedies for Anxiety

A handful of herbs have real trial evidence behind them for mild anxiety. Others are traditional but unproven, and a few interact dangerously with common medications. Here is the honest split.

What has the best evidence

Lemon balm (Melissa officinalis)

One of the better-studied options for acute anxiety — the tense-before-something kind rather than a chronic condition. Trials have used 300–600 mg standardised extract, and effects appear within 1–3 hours.

• Tea: 1–2 teaspoons of dried leaf, covered, steeped 10 minutes
• Avoid with thyroid medication — it can interfere

Passionflower (Passiflora incarnata)

Compared favourably with oxazepam in a small pre-surgery trial, with less drowsiness. Often combined with lemon balm.

• Tea: 1 teaspoon dried herb, steeped 10 minutes
• Do not combine with sedatives without advice

Chamomile

Modest but consistent effects on generalised anxiety in short trials. Very safe, which makes it a reasonable first thing to try.

• 1 heaped teaspoon of dried flowers per cup, covered, 5–10 minutes
• Avoid if you react to other daisy-family plants

Ashwagandha

The strongest evidence for chronic stress and anxiety, across several randomised trials at 300–600 mg/day of root extract. Takes 4–8 weeks, not hours.

• Not for pregnancy, or with thyroid medication
• Rare reports of liver injury — stop if you feel unwell

Traditional but unproven

• St John's wort — works for mild depression, but it is a serious drug interactor (contraceptives, anticoagulants, antidepressants). Not a casual tea.
• Valerian — better evidence for sleep than for daytime anxiety.
• Kava — effective in trials, but liver toxicity risk means it is not a first choice.
• Lavender oil capsules — some positive trials, but capsules are not the same as the scent.

What actually helps more than any herb

• Slow breathing — 6 breaths per minute for 5 minutes lowers physiological arousal measurably.
• Caffeine — the single most common hidden driver of everyday anxiety. Two weeks off tells you a lot.
• Sleep debt — anxiety and poor sleep amplify each other; treating one helps the other.
• Exercise — the effect size in trials is comparable to medication for mild cases.

When herbs are the wrong answer

See a doctor if anxiety stops you working, leaves the house, or comes with panic attacks, chest pain or suicidal thoughts. Herbs are for mild, situational anxiety — not a substitute for treatment.

Also: never stop prescribed medication to try an herb, and check interactions. St John's wort in particular reduces the effectiveness of many drugs.

Common questions

What is the fastest herb for anxiety?

Lemon balm and passionflower act within 1-3 hours. Ashwagandha takes 4-8 weeks.

Can you take these with antidepressants?

Not without checking. St John's wort and kava are the highest risk; chamomile and lemon balm are lower but still worth confirming with a pharmacist.

How much chamomile tea for anxiety?

One heaped teaspoon of dried flowers per cup, up to 3-4 cups a day. Trials used standardised extract, so tea is gentler.

Is ashwagandha safe long term?

Trials ran 8-12 weeks. There are rare liver-injury reports, so cycle it and stop if you feel unwell.

Disclosure: the link above is an affiliate link. This is not medical advice.

Sources and further reading

Health pages on this site are checked against primary sources rather than other wellness sites. The main sources for this page:

• Cochrane Library — reviews on herbal medicines for anxiety disorders (limited evidence base overall)
• Chandrasekhar K, et al. (2012), Indian Journal of Psychological Medicine — randomised, double-blind, placebo-controlled trial of ashwagandha root extract for stress and anxiety in adults
• NICE guidance on generalised anxiety disorder in adults — first-line treatment pathways
• NHS — anxiety and panic disorder self-help guidance

This page describes what is traditionally used and what has been studied. It is not medical advice, and it is not a substitute for seeing a clinician. Where evidence is weak or mixed, the page says so.