Lavender

botanical3,7-dimethylocta-1,6-dien-3-yl acetate

What is it

Lavender refers to several species in the Lavandula genus, with Lavandula angustifolia (English lavender) being the most commonly used medicinally. Its flowers and essential oil have been used in traditional medicine and aromatherapy for centuries for anxiety, sleep, and skin conditions.

How it works

Lavender's bioactive compounds are concentrated in its essential oil, which is approximately 30 to 50 percent linalool and 30 to 40 percent linalyl acetate, along with smaller amounts of other terpenes. Oral lavender essential oil (Silexan, the standardized German preparation) has been shown to bind to voltage-gated calcium channels and to have effects on multiple neurotransmitter systems, producing anxiolytic effects without GABA-receptor binding (and therefore without benzodiazepine-like dependence potential). Aromatic lavender works through different pathways. Inhaled linalool reaches the brain rapidly through olfactory and respiratory routes and has been shown in clinical trials to reduce subjective anxiety, lower heart rate and blood pressure, and modestly improve sleep quality. The aromatherapy effect involves both pharmacological action and the well-documented influence of pleasant scents on autonomic nervous system function and mood. Clinical evidence is most established for oral Silexan in anxiety disorders and for aromatherapy lavender in pre-operative, peri-operative, and labor settings.

Evidence for 6 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Anxiety disorders (generalized, subsyndromal)

Grade B

Good evidence

Multiple randomized trials of Silexan (80 to 160 mg/day) have shown reductions in anxiety scores in generalized anxiety disorder, mixed anxiety-depressive disorder, and subsyndromal anxiety over 6 to 10 weeks. A 2019 meta-analysis confirmed efficacy comparable to low-dose paroxetine and lorazepam in some trials, without dependence potential.

Sleep quality

Grade C

Moderate evidence

Aromatherapy lavender (oil inhaled or applied) has shown modest improvements in subjective sleep quality, particularly in hospitalized patients, ICU patients, and adults with mild insomnia. Oral Silexan also improves sleep, though anxiety reduction may be the upstream mechanism.

Pre-operative and procedural anxiety

Grade C

Moderate evidence

Aromatherapy lavender used pre-operatively, during dental procedures, and before MRI scans has shown modest reductions in anxiety scores in multiple trials. Effects are smaller than benzodiazepines but the safety profile makes it a useful adjunct.

Depression (mixed anxiety-depressive)

Grade C

Moderate evidence

Trials of Silexan in mixed anxiety-depressive disorder have shown reductions in depressive symptoms alongside anxiety improvements. Not standard treatment for major depression.

Headache and migraine

Grade D

Mixed evidence

Small trials of inhaled lavender essential oil have suggested benefit for tension headache and migraine. Evidence is preliminary.

Wound healing and minor burns (topical)

Grade D

Mixed evidence

Traditional use includes topical lavender for minor wounds and burns. Modern controlled evidence is limited; aromatic and antimicrobial properties provide plausible mechanism.

4 commercial forms

Silexan (lavender essential oil capsules)

Standardized oral preparation; the form used in nearly all positive anxiety trials.

Pharmaceutical-grade lavender oil in soft gel capsules. 80 mg once or twice daily for anxiety. Available in Europe; less commonly sold in US.

Lavender essential oil (aromatherapy or topical)

Inhaled or applied diluted; rapid CNS effects from inhalation.

Diffused, on pillows, in baths, or diluted in carrier oil for massage. Never apply undiluted to skin or ingest the concentrated oil.

Lavender tea (dried flowers)

Lower concentrated dose than oral capsules.

Traditional preparation. 1 to 2 tsp dried flowers per cup. Pleasant evening drink for relaxation.

Lavender tincture (alcohol extract)

Liquid form with variable bioactive content.

Traditional herbal preparation. Less commonly used than essential oil.

Dosage

Oral Silexan (standardized lavender essential oil capsules) is dosed at 80 to 160 mg per day, typically as 80 mg once or twice daily. For aromatherapy, 2 to 4 drops of essential oil in a diffuser, on a pillow, or in a bath are common. Lavender tea uses 1 to 2 tsp dried flowers per cup. Topical applications dilute essential oil in a carrier oil (1 to 3 percent for skin).

When and how to take it

For anxiety, take Silexan 80 mg in the morning or evening (or both, up to 160 mg/day) with or without food. Effects build over 2 to 6 weeks of consistent use. For sleep support, take 80 mg 30 to 60 minutes before bed, or use aromatherapy (4 drops in a diffuser running for 2 to 4 hours before sleep, or 1 to 2 drops on a pillow corner). Aromatherapy bath: 4 to 8 drops in a warm bath at the end of the day. Topical massage: 1 to 3 percent essential oil in a carrier oil applied to chest or neck.

Food sources

Food	Amount	%DV
Culinary lavender (1 tsp dried)	small amount of bioactives	—
Lavender honey or syrup	minimal bioactives; flavoring use	—
Lavender tea (1 cup)	~1 to 2 tsp dried flowers	—

Safety

Oral Silexan is generally well tolerated. Common side effects include burping, GI upset, and skin reactions. No formal Tolerable Upper Intake Level has been established. The high concentration of linalool can be irritating to skin if used undiluted; always dilute essential oil in carrier oil for topical use. Lavender essential oil applied topically to young boys has been associated in case reports with rare prepubertal gynecomastia, possibly through estrogenic or anti-androgenic effects of certain compounds. Subsequent investigations have not consistently confirmed this risk, but caution with topical use in young boys is reasonable. Pregnancy and breastfeeding have limited safety data for oral medicinal doses; aromatic use is generally considered safer. Lavender essential oil is poisonous if swallowed in concentrated form (this differs from properly diluted dietary capsules).

Who should be cautious

Do not swallow undiluted essential oil. Use cautiously on sedatives, sleep medications, alcohol, or antihypertensives. Aromatherapy and topical use have limited risk in pregnancy; oral Silexan use during pregnancy or breastfeeding has limited safety data. Use diluted topical lavender essential oil cautiously in prepubertal boys due to case reports of gynecomastia. Children may use age-appropriate aromatherapy doses; coordinate with pediatrician for oral use.

Interactions

Oral lavender may enhance the sedative effects of benzodiazepines, barbiturates, alcohol, sleep medications, and other CNS depressants. May modestly lower blood pressure, compounding antihypertensives. May enhance the effects of cholesterol-lowering drugs at high doses. No major interactions with most common medications at typical doses. Topical and aromatherapy use carry minimal interaction risk.

Frequently asked questions

Does oral lavender really work for anxiety?⌄

Yes, with reasonably strong evidence. Silexan (the standardized oral lavender essential oil capsule used in trials) at 80 to 160 mg/day has shown efficacy comparable to low-dose paroxetine and lorazepam for generalized anxiety disorder over 6 to 10 weeks, without the dependence potential of benzodiazepines.

Can I just inhale lavender essential oil instead of taking it orally?⌄

Aromatherapy lavender has evidence for sleep, pre-operative anxiety, and mood, but effect sizes are smaller and less consistent than oral Silexan for clinical anxiety. Aromatherapy is a great adjunct; oral capsules are more therapeutic for moderate anxiety.

Is it safe to swallow lavender essential oil?⌄

Not the concentrated essential oil sold for aromatherapy or topical use. That's highly concentrated and can be toxic if swallowed. Oral lavender preparations like Silexan are specifically formulated for oral use at controlled doses.

Will lavender essential oil cause gynecomastia in boys?⌄

Case reports have linked repeated topical use of lavender and tea tree essential oils to prepubertal gynecomastia. Subsequent research is mixed; the issue isn't fully settled but caution with frequent topical use in young boys is reasonable.

How fast does lavender work?⌄

Aromatherapy effects on acute anxiety can appear within 30 to 60 minutes. Oral Silexan for chronic anxiety builds over 2 to 6 weeks of consistent daily use.

References

Wikidata: Lavandula angustifolia — Wikidata link

Track Lavender with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.