This product is not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider before using herbs, especially if you are pregnant, nursing, taking medications, or have a medical condition.
This herb may interact with medications you are taking. Review the interactions table below and consult your healthcare provider before use.
What is a herb–drug interaction?
A herb–drug interaction happens when a plant or supplement changes how a medication works in your body — making it stronger, weaker, or more likely to cause harm. Herbs contain active compounds that can speed up or slow down the enzymes and transporters your body uses to process drugs.
Why it matters
•St. John's Wort can make birth control, antidepressants, and blood thinners less effective.
•Garlic can increase bleeding risk with warfarin and other blood thinners (also ginkgo, ginger, and turmeric).
•Kava can amplify sedation when taken with anxiety or sleep medications (also valerian).
The risk is highest for older adults, anyone taking several medications, and people with chronic conditions.
Always tell your doctor and pharmacist about every herb and supplement you take — and check below before combining.
Lemon balm may enhance sedative effects of barbiturates and other CNS depressants.
This list reflects a curated subset of documented interactions and is not exhaustive. The absence of a drug here is not proof that it is safe to combine. Always confirm with a pharmacist or healthcare provider.
Lemon balm contains active compounds, particularly rosmarinic acid and citral, that modulate gamma-aminobutyric acid (GABA) receptors in the brain. GABA is the primary inhibitory neurotransmitter responsible for calming neural activity. By enhancing GABAergic transmission, lemon balm produces gentle anxiolytic effects without the sedation associated with stronger pharmaceuticals. It also inhibits acetylcholinesterase, supporting cognitive function. Evidence level: B.
Does lemon balm interact with medications?
Lemon balm may interact with sedative medications including benzodiazepines, barbiturates, and sleep aids, potentially causing excessive drowsiness. It may also interfere with thyroid hormone medications and should be avoided by individuals with thyroid conditions. Due to its sedative effects, discontinue lemon balm at least two weeks before scheduled surgery. Always consult a healthcare provider before combining with prescription medications. Evidence level: C.
How much lemon balm should I take for anxiety?
Clinical studies for anxiety typically use 300-600mg of standardized lemon balm extract daily. For tea, steep 1.5-4.5 grams of dried herb in hot water for 5-10 minutes, consuming 2-4 cups daily. Start with lower doses to assess individual tolerance. Effects are generally mild and cumulative, so consistent daily use over several weeks may provide optimal benefits. Evidence level: B.
Is lemon balm safe during pregnancy and breastfeeding?
Lemon balm is generally considered safe during pregnancy and breastfeeding when consumed in culinary amounts. The Botanical Safety Handbook classifies it as safe when used appropriately. However, medicinal doses should only be taken under healthcare provider supervision, as clinical data for high-dose supplementation during pregnancy remains limited. Traditional use over centuries has not revealed significant safety concerns. Evidence level: Traditional.
Can lemon balm help treat cold sores?
Yes, lemon balm demonstrates antiviral activity against herpes simplex virus type 1 (HSV-1). Topical preparations containing 1% lemon balm leaf extract, applied 3-4 times daily at the first sign of symptoms, may reduce healing time, itching, and tingling. Some evidence suggests regular application may decrease outbreak frequency. Look for standardized creams or ointments formulated specifically for cold sore treatment. Evidence level: B.
PubMed-compiled information sheet
This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.
Compiled from 38 PubMed articles · model: glm-5.2
Summary
Lemon balm (Melissa officinalis L.) is a medicinal plant rich in bioactive compounds including flavonoids, terpenoids, phenolic acids, and essential oil, with pharmacological effects spanning anxiolytic, antioxidant, anti-inflammatory, antimicrobial, neuroprotective, and cardiometabolic domains [PMID:35408950, PMID:35730441].
Background
Melissa officinalis L. is a perennial aromatic herb of the Lamiaceae family, native to the east Mediterranean and west Asian regions, now cultivated widely, and has long been used in European and Iranian Traditional Medicine for the treatment of several diseases [PMID:38381912, PMID:27167460, PMID:33967832].
Traditional uses
Lemon balm has been used in traditional medicine for nervousness, anxiety, insomnia, menstrual irregularities, gastrointestinal disorders, cardiovascular conditions, neurological and psychological conditions, and as a digestive, carminative, antispasmodic, sedative, analgesic, tonic, and diuretic agent [PMID:38381912, PMID:35730441, PMID:27620926, PMID:27167460].
Active compounds
The main active constituents include volatile compounds (geranial, neral, citronellal, geraniol), triterpenes (ursolic acid, oleanolic acid), phenolic acids (rosmarinic acid, caffeic acid, chlorogenic acid, protocatechuic acid), flavonoids (quercetin, rhamnocitrin, luteolin), tannins, and essential oil [PMID:35408950, PMID:33967832, PMID:40927050].
Mechanism of action
Pharmacological evidence from animal and cellular work reveals that lemon balm and its components may modulate several brain signalling pathways, including GABAergic, cholinergic, and serotonergic systems; rosmarinic acid modulates gamma-aminobutyric acid transaminase (GABA-T) activity, which may underpin its effects on sleep quality and psychological well-being [PMID:39458539, PMID:39683592, PMID:41226605]. The plant also exhibits antioxidant, anti-inflammatory, antispasmodic, antimicrobial, neuroprotective, nephroprotective, and antinociceptive effects [PMID:35730441].
Clinical evidence
Evidence AAnxiety and Depression
A systematic review and meta-analysis found that lemon balm significantly improved mean anxiety and depression scores compared with placebo (SMD: -0.98; 95% CI: -1.63 to -0.33; p=0.003 for anxiety; SMD: -0.47; 95% CI: -0.73 to -0.21; p=0.0005 for depression), without serious side effects [PMID:34449930].
Evidence BAnxiety in Hemodialysis Patients (Aromatherapy)
A randomized clinical trial showed that Melissa officinalis essential oil inhalation aromatherapy (3 times/week for one month) significantly reduced anxiety and symptom burden in hemodialysis patients compared to control [PMID:40082838].
Evidence BMood and Cognitive Function
Two double-blind, placebo-controlled, crossover studies demonstrated that standardized M. officinalis preparations in beverage and yoghurt forms were generally associated with improvements in mood and/or cognitive performance in healthy young adults [PMID:25360512].
Evidence BSleep Quality
A prospective, double-blind, placebo-controlled, cross-over study found that a Melissa officinalis standardized extract formulated as Phytosome (MOP) significantly reduced ISI (Insomnia Severity Index) scores, with an average reduction of 6.8 ± 4, supporting its role in improving sleep quality [PMID:39683592].
Evidence A
Safety & adverse effects
Lemon balm extracts are generally recognized as safe and have not been linked to serum aminotransferase elevations during treatment or to instances of clinically apparent acute liver injury [PMID:38381912]. A toxicological safety evaluation including genotoxicity tests and a 90-day repeated dose oral toxicity study in rats confirmed that aqueous lemon balm extract is not genotoxic at concentrations up to 5000 µg/plate or 5000 µg/mL [PMID:38461950]. However, a case report describes a 30-year-old patient who presented with restlessness, tremor, distractibility, and sweating following discontinuation of Melissa officinalis consumption, suggesting possible withdrawal symptoms related to dependence from long-term use [PMID:25870482].
Pregnancy & lactation
Lemon balm is a purported galactogogue with some weak supporting evidence of galactogogue activity; no data exist on the excretion of any components of lemon balm into breastmilk or on the safety and efficacy of lemon balm alone in nursing mothers or infants, though it has been safely and effectively used with other herbs in infants for colic, diarrhea, and other conditions [PMID:30000901].
Evidence summary
The evidence base for lemon balm includes multiple systematic reviews and meta-analyses (Level A) supporting its anxiolytic, antidepressant, and cardiometabolic effects, several randomized controlled trials (Level B) demonstrating benefits for mood, cognition, sleep quality, anxiety in hemodialysis patients, and skin antiwrinkle effects, and numerous reviews (Level C) summarizing preclinical and clinical evidence for antiviral, neuroprotective, and cognitive applications. Overall, the strongest clinical evidence supports its use for anxiety, depression, and sleep-related outcomes, though heterogeneity in preparations and standardization limits comparability across studies [PMID:41754356].
PubMed sources
1.PMID: 35408950 (2022) — Melissa officinalis: Composition, Pharmacological Effects and Derived Release Systems-A Review. · International journal of molecular sciences
2.PMID: 38381912 (2012) — A Narrative Review of Alternative Symptomatic Treatments for Herpes Simplex Virus. · Viruses
3.PMID: 39458539 (2024) — Clinical Efficacy and Tolerability of Lemon Balm (Melissa officinalis L.) in Psychological Well-Being: A Review. · Nutrients
4.PMID: 34449930 (2021) — The effects of lemon balm (Melissa officinalis L.) on depression and anxiety in clinical trials: A systematic review and meta-analysis. · Phytotherapy research : PTR
5.PMID: 27167460 (2016) — Melissa officinalis L. - A review of its traditional uses, phytochemistry and pharmacology. · Journal of ethnopharmacology
Government sources
No direct government monograph is available for this herb. The content below is AI-generated and has not been verified against an authoritative government source. Use the search links to check official sources before relying on this information.
A systematic review and meta-analysis of RCTs found that Melissa officinalis intake was associated with reduced total cholesterol (SMD: -0.26; 95% CI: -0.52, -0.01) and reduced systolic blood pressure (SMD: -0.56; 95% CI reported) [PMID:32614129]. A separate meta-analysis of RCTs investigated the effects of M. officinalis on serum lipid profile including HDL, LDL, triglycerides, and total cholesterol [PMID:38575930].
Evidence CCognition and Alzheimer's Disease
Reviews indicate that in elderly individuals with mild cognitive impairment or early Alzheimer's disease, extracts standardized in rosmarinic acid stabilized cognitive functions and reduced neuropsychiatric symptoms such as agitation; lemon balm may also offer cholinesterase inhibition as a safer alternative to alkaloid drugs [PMID:41226605, PMID:28143625, PMID:33953850].
Evidence CHerpes Simplex Virus
Reviews indicate that lemon balm (Melissa officinalis) has been investigated as a natural remedy for Herpes simplex, with research showing it can inhibit HSV-1 from binding to host cells and inhibit HSV-1 replication during post-adsorption [PMID:38381912, PMID:16813459, PMID:36655201].
Evidence BAntiwrinkle / Skin Photoaging
A randomized controlled trial found that lemon balm leaf extract promotes Endo180 production in dermal fibroblasts and has an antiwrinkle effect on human skin [PMID:39888701].
6.PMID: 35730441 (2022) — An Updated Review on The Properties of Melissa officinalis L.: Not Exclusively Anti-anxiety. · Frontiers in bioscience (Scholar edition)
7.PMID: 30000901 (2006) — A review of effective herbal medicines in controlling menopausal symptoms. · Electronic physician
8.PMID: 39683592 (2024) — Effects of Melissa officinalis Phytosome on Sleep Quality: Results of a Prospective, Double-Blind, Placebo-Controlled, and Cross-Over Study. · Nutrients
9.PMID: 40082838 (2025) — The effectiveness of Melissa officinalis L. essential oil inhalation on anxiety and symptom burden of hemodialysis patients: a randomized trial study. · BMC complementary medicine and therapies
10.PMID: 38575930 (2024) — Effects of Melissa officinalis (lemon balm) consumption on serum lipid profile: a meta-analysis of randomized controlled trials. · BMC complementary medicine and therapies
11.PMID: 22614273 (2012) — DNA isolation protocol for the medicinal plant lemon balm (Melissa officinalis, Lamiaceae). · Genetics and molecular research : GMR
12.PMID: 32614129 (2020) — Effects of Melissa officinalis (Lemon Balm) on cardio-metabolic outcomes: A systematic review and meta-analysis. · Phytotherapy research : PTR
13.PMID: 27620926 (2017) — Melissa officinalis L: A Review Study With an Antioxidant Prospective. · Journal of evidence-based complementary & alternative medicine
14.PMID: 36655201 (2023) — Antiviral Potential of Melissa officinalis L.: A Literature Review. · Nutrition and metabolic insights
15.PMID: 16813459 (2006) — Natural remedies for Herpes simplex. · Alternative medicine review : a journal of clinical therapeutic
16.PMID: 33967832 (2021) — Melissa officinalis L. as a Nutritional Strategy for Cardioprotection. · Frontiers in physiology
17.PMID: 37107263 (2023) — Subcritical Water Extraction of Rosmarinic Acid from Lemon Balm (Melissa officinalis L.) and Its Effect on Plant Cell Wall Constituents. · Antioxidants (Basel, Switzerland)
18.PMID: 38461950 (2024) — Toxicological safety evaluation of an aqueous lemon balm (Melissa officinalis) extract. · Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association
19.PMID: 41226605 (2025) — Unraveling the Effects of Melissa officinalis L. on Cognition and Sleep Quality: A Narrative Review. · International journal of molecular sciences
20.PMID: 41754356 (2026) — Melissa officinalis L. (Lemon Balm): An Integrative Review of Phytochemistry and Evidence from Preclinical Research to Clinical Studies. · Plants (Basel, Switzerland)
22.PMID: 28143625 (2017) — Potential benefits of phytochemicals against Alzheimer's disease. · The Proceedings of the Nutrition Society
23.PMID: 38758440 (2024) — Foliar-applied iron and zinc nanoparticles improved plant growth, phenolic compounds, essential oil yield, and rosmarinic acid production of lemon balm (Melissa officinalis L.). · Environmental science and pollution research international
24.PMID: 39888701 (2025) — Lemon Balm (Melissa officinalis L.) Leaf Extract Promotes Endo180 Production in Dermal Fibroblasts and has Antiwrinkle Effect on Human Skin. · Photodermatology, photoimmunology & photomedicine
26.PMID: 37769497 (2023) — Modulation of chicken gut contractility by Melissa officinalis-ex vivo study. · Poultry science
27.PMID: 34718102 (2022) — Lemon balm (Melissa officinalis L.) essential oil and citronellal modulate anxiety-related symptoms - In vitro and in vivo studies. · Journal of ethnopharmacology
28.PMID: 25870482 (2015) — Does melissa officinalis cause withdrawal or dependence? · Medical archives (Sarajevo, Bosnia and Herzegovina)
29.PMID: 37207879 (2023) — The potential of lemon balm (Melissa officinalis L.) essential oil as an anti-anxiety agent - is the citronellal the activity carrier? · Journal of ethnopharmacology
30.PMID: 33953850 (2021) — Alzheimer's disease treatment: The share of herbal medicines. · Iranian journal of basic medical sciences
31.PMID: 16635970 (2005) — Lemon balm (Melissa officinalis L.): an evidence-based systematic review by the Natural Standard Research Collaboration. · Journal of herbal pharmacotherapy
32.PMID: 26396973 (2015) — Evaluation of Melissa officinalis (Lemon Balm) Effects on Heart Electrical System. · Research in cardiovascular medicine