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Melissa officinalis (leaf extract)

Herbal sedative, EMA HMPC traditional herbal medicinal product

ATC code: N05CX-MELISSA(Lemon balm (Melissa officinalis, leaf))

Brand names: Nature's Answer Lemon Balm, NOW Lemon Balm, Solgar Lemon Balm Extract, Cyracos

Updated · Methodology

Indications

C

Functional dyspepsia

Adjunct

Lemon balm is part of combined herbal products (Iberogast and analogues) with a confirmed effect in functional dyspepsia – post-prandial fullness, early satiety and epigastric pain per Rome IV criteria. Lemon balm essential oils relax intestinal smooth muscle and ease spasm. HMPC separately recognises lemon balm for mild GI cramps. In monotherapy lemon balm has scarce data – clinical benefit is mainly proven for combined formulations. Taking 1–2 g of dried herb or an equivalent extract 2–3 times daily for 2–4 weeks is acceptable for mild symptoms. If symptoms persist beyond a month or come with weight loss, vomiting or blood in stool, gastroscopy is needed, not herbs.

Sources

  1. EMA HMPC: Community herbal monograph on Melissa officinalis L., folium (2013)
  2. Rome Foundation: Rome IV criteria for functional dyspepsia (2016)

ICD-10: K30 · ICD-11: DD90.3

C

Insomnia and sleep disorders

Adjunct

Lemon balm is used for mild sleep disturbance and nervous tension – often combined with valerian. HMPC in 2013 confirmed traditional-use status for these indications based on 30 years of practice. Several small RCTs with the proprietary Cyracos extract (Naturex) showed modest improvement in subjective sleep quality and lower anxiety, but samples were small and trials manufacturer-funded. No positive systematic review exists. The 2021 insomnia guideline does not mention lemon balm. For mild episodic insomnia a short course of 300–600 mg of extract in the evening is acceptable. If the herb was prescribed as monotherapy for severe chronic insomnia, consider seeking a second opinion; the evidence for first-line CBT-I is far stronger.

Sources

  1. EMA HMPC: Community herbal monograph on Melissa officinalis L., folium (2013)
  2. AASM (Edinger): Behavioral and psychological treatments for chronic insomnia in adults (2021)

ICD-10: G47.0 · ICD-11: 7A00

Marketing claims without evidence base

The drug is promoted for these uses outside international guidelines. Each entry below is analyzed against AEMPS, FDA, EMA, Cochrane and major RCTs.

D

Stress and anxiety

Not recommended

Lemon balm is often marketed as a «universal anti-stress» remedy, even for full-blown anxiety disorders. HMPC limits its indication to mild nervous tension and does not extend it to GAD, panic disorder or social anxiety. No positive RCTs exist in diagnosed anxiety disorders. CG113 (2019) does not mention lemon balm. The standard of care is CBT and SSRIs/SNRIs when needed. If lemon balm was offered for panic attacks, GAD or severe stress as a replacement for psychotherapy and prescribed medication, consider seeking a second opinion. For episodic nervousness before a difficult task a short course is acceptable, but it is a symptomatic measure.

Sources

  1. EMA HMPC: Community herbal monograph on Melissa officinalis L., folium (2013)
  2. NICE: Generalised anxiety disorder and panic disorder in adults: management (2020)

ICD-10: F41.9 · ICD-11: 6B0Z

How to read tiers A–F
  • AStrong evidence – first or second line in international guidelines
  • BRecommended in selected cases
  • CStudy data contradict each other
  • DBenefit not proven, no documented harm
  • FDocumented harm, or risk without benefit

Mechanism of action

Lemon balm leaf contains rosmarinic acid, caffeic acid, flavonoids and essential oils with citronellal, citral and linalool. Rosmarinic acid inhibits GABA transaminase in vitro and raises synaptic GABA levels – the proposed basis for its mild sedative effect. Essential oils provide spasmolytic action on intestinal smooth muscle, so lemon balm is also used for functional dyspepsia. HMPC in 2013 classified lemon balm leaf extract as a traditional herbal medicinal product based on 30 years of use, without large RCT confirmation. Bioavailability of the active constituents is low.

Safety

Contraindications

  • Hypersensitivity to lemon balm or other Lamiaceae
  • Age under 12 (EMA HMPC – no data)
  • Pregnancy and lactation
  • Untreated hypothyroidism – theoretical reduction of TSH effect

Serious adverse effects

  • Potentiation of alcohol, benzodiazepines and opioids
  • Hypersensitivity allergic reactions

Common adverse effects

  • Drowsiness
  • Mild dizziness
  • Gastrointestinal discomfort

Pregnancy: can you take Melissa officinalis (leaf extract)?

Safety data in pregnancy are insufficient. EMA HMPC does not recommend use in pregnancy due to lack of adequate studies. AEMPS classifies the product as a traditional herbal medicinal product without a pregnancy indication. Culinary use as a spice is safe; medicinal doses of concentrated extracts are not justified in gestation.

Breastfeeding: can you take Melissa officinalis (leaf extract)?

Data on transfer of lemon balm constituents into human milk are lacking. EMA HMPC does not recommend medicinal doses during lactation.

Calculate RID

Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.

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Frequently asked

What is Melissa officinalis (leaf extract) used for?

Melissa officinalis (leaf extract) is evaluated for the following indications with varying evidence strength: Insomnia and sleep disorders (evidence tier C), Functional dyspepsia (evidence tier C), Stress and anxiety (evidence tier D). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Melissa officinalis (leaf extract)?

Common side effects of Melissa officinalis (leaf extract) (≥ 1 in 100): Drowsiness, Mild dizziness, Gastrointestinal discomfort. See the Safety section for uncommon and serious reactions.

Is Melissa officinalis (leaf extract) safe during pregnancy?

Safety data in pregnancy are insufficient. EMA HMPC does not recommend use in pregnancy due to lack of adequate studies. AEMPS classifies the product as a traditional herbal medicinal product without a pregnancy indication. Culinary use as a spice is safe; medicinal doses of concentrated extracts are not justified in gestation.

Is Melissa officinalis (leaf extract) compatible with breastfeeding?

Data on transfer of lemon balm constituents into human milk are lacking. EMA HMPC does not recommend medicinal doses during lactation.

Who should not take Melissa officinalis (leaf extract)?

Melissa officinalis (leaf extract) is contraindicated in: Hypersensitivity to lemon balm or other Lamiaceae; Age under 12 (EMA HMPC – no data); Pregnancy and lactation; Untreated hypothyroidism – theoretical reduction of TSH effect. Full list in the Safety section.

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