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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Plant Allergenic Extract [EPC]
Melissa Officinalis, commonly known as Lemon Balm, is a botanical substance classified as a Non-Standardized Plant Allergenic Extract [EPC]. It is utilized in clinical settings for diagnostic allergy testing and has various applications in complementary medicine for its sedative and anxiolytic prope...
Name
Melissa Officinalis
Raw Name
MELISSA OFFICINALIS
Category
Non-Standardized Plant Allergenic Extract [EPC]
Drug Count
8
Variant Count
8
Last Verified
February 17, 2026
About Melissa Officinalis
Melissa Officinalis, commonly known as Lemon Balm, is a botanical substance classified as a Non-Standardized Plant Allergenic Extract [EPC]. It is utilized in clinical settings for diagnostic allergy testing and has various applications in complementary medicine for its sedative and anxiolytic properties.
Detailed information about Melissa Officinalis
References used for this content
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Melissa Officinalis.
Melissa Officinalis, widely known by its common name Lemon Balm, is a perennial herb in the mint family (Lamiaceae). In the context of clinical pharmacology and the FDA's Electronic Orange Book, it is categorized primarily as a Non-Standardized Plant Allergenic Extract [EPC]. This classification indicates its use in the diagnosis and potentially the treatment of hypersensitivity reactions (allergies) to plant-based substances. Beyond its role as an allergenic extract, Melissa Officinalis has been studied extensively for its phytochemical profile, which includes volatile oils, flavonoids, and phenolic acids.
From a pharmacological perspective, Melissa Officinalis belongs to a class of drugs called allergenic extracts when used for diagnostic purposes. However, in broader clinical practice, it is often discussed alongside sedative-hypnotics or anxiolytics due to its observed effects on the central nervous system (CNS). The FDA has historically recognized Melissa Officinalis as 'Generally Recognized as Safe' (GRAS) for use in food, while its specific use as a standardized or non-standardized allergenic extract is governed by regulations concerning biological products. Healthcare providers may utilize these extracts in skin prick testing (SPT) to identify specific IgE-mediated sensitivities in patients presenting with allergic rhinitis or contact dermatitis.
The mechanism of action for Melissa Officinalis varies significantly depending on its application. When used as an allergenic extract, the mechanism involves the controlled exposure of the patient's immune system to the plant's proteins. If the patient is sensitized, these proteins cross-link with specific Immunoglobulin E (IgE) antibodies bound to mast cells and basophils, triggering the release of histamine and other inflammatory mediators, which results in a visible 'wheal and flare' reaction.
At a molecular level, when ingested or applied for its therapeutic properties, Melissa Officinalis is thought to interact with the gamma-aminobutyric acid (GABA) system. Research suggests that certain constituents, particularly rosmarinic acid, inhibit the enzyme GABA-transaminase (GABA-T). GABA-T is responsible for the degradation of GABA, the primary inhibitory neurotransmitter in the brain. By inhibiting this enzyme, Melissa Officinalis may increase the concentration of GABA in the synaptic cleft, leading to anxiolytic (anti-anxiety) and sedative effects. Additionally, some studies indicate that the extract may have affinity for muscarinic and nicotinic acetylcholine receptors, suggesting a complex role in cognitive function and neuroprotection.
Understanding the pharmacokinetics of a complex botanical extract like Melissa Officinalis requires looking at its primary active markers, such as rosmarinic acid.
As an FDA-classified EPC, the primary clinical use is:
Commonly recognized therapeutic uses (often as a dietary supplement or topical agent) include:
Melissa Officinalis is available in several clinical and commercial forms:
> Important: Only your healthcare provider can determine if Melissa Officinalis is right for your specific condition.
Dosage for Melissa Officinalis varies significantly based on the intended use and the specific formulation. Healthcare providers typically follow these guidelines:
Melissa Officinalis has been used in pediatric populations, but strict medical supervision is required.
There are no specific dosage adjustment guidelines for patients with renal impairment. However, because the metabolites of rosmarinic acid are excreted renally, healthcare providers may recommend a lower starting dose or increased monitoring in patients with Stage 3 or higher Chronic Kidney Disease (CKD).
While Melissa Officinalis is not typically associated with hepatotoxicity, patients with severe hepatic impairment (Child-Pugh Class C) should use the extract with caution. The liver is the primary site for the conjugation of phenolic compounds found in the plant.
Geriatric patients may be more sensitive to the CNS-depressant effects of Melissa Officinalis. Healthcare providers often suggest starting at the lowest end of the dosing range (e.g., 300 mg once daily) to assess for dizziness or increased fall risk.
If a dose is missed, it should be taken as soon as remembered. However, if it is nearly time for the next scheduled dose, the missed dose should be skipped. Do not double the dose to catch up, as this increases the risk of excessive sedation.
Signs of an overdose of Melissa Officinalis may include:
In the event of a suspected overdose, contact a poison control center or seek emergency medical attention immediately. While not typically life-threatening, supportive care may be required to manage respiratory or cardiovascular depression in extreme cases.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance.
In clinical studies and post-marketing surveillance, Melissa Officinalis is generally well-tolerated. However, some patients may experience:
> Warning: Stop taking Melissa Officinalis and call your doctor immediately if you experience any of these.
The long-term safety of Melissa Officinalis (beyond 4-6 months of continuous use) has not been established in large-scale clinical trials. The primary concern with chronic administration is the potential for thyroid hormone inhibition. Melissa Officinalis may inhibit the binding of Thyroid Stimulating Hormone (TSH) to its receptors and interfere with the peripheral conversion of T4 to T3. Patients using the herb for more than 8 weeks should have their thyroid function monitored by a healthcare provider.
No FDA black box warnings currently exist for Melissa Officinalis. As a non-standardized plant allergenic extract, it does not carry the same high-risk profile as potent synthetic pharmaceuticals like opioids or certain antidepressants. However, the lack of a black box warning does not imply absolute safety; clinical judgment is always required.
Report any unusual symptoms to your healthcare provider.
Melissa Officinalis should be used with caution in individuals with known endocrine disorders or those scheduled for surgery. While it is a natural botanical, its pharmacological activity is significant enough to interfere with physiological processes and other medications. Patients should be aware that 'natural' does not equate to 'risk-free.'
No FDA black box warnings for Melissa Officinalis.
For patients using Melissa Officinalis therapeutically for extended periods (longer than 30 days), healthcare providers may require:
Melissa Officinalis can cause significant drowsiness and impair motor coordination. Patients should not drive, operate heavy machinery, or engage in hazardous activities until they are certain how the substance affects them. The risk of impairment is significantly increased if the extract is combined with alcohol or other sedatives.
Alcohol should be avoided while taking Melissa Officinalis. Both substances act as CNS depressants; combining them can lead to excessive sedation, respiratory depression, and an increased risk of accidents or falls.
There is no evidence of a formal withdrawal syndrome associated with Melissa Officinalis. However, for those using it for anxiety or sleep, sudden discontinuation may result in a 'rebound' effect, where symptoms return with greater intensity. It is generally advised to taper the dose over one week if it has been used daily for several months.
> Important: Discuss all your medical conditions with your healthcare provider before starting Melissa Officinalis.
For each major interaction, the mechanism is usually pharmacodynamic (additive effects on the same physiological system) rather than pharmacokinetic (interference with drug metabolism enzymes).
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking.
Melissa Officinalis must NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a healthcare provider include:
Patients who are allergic to other plants in the Lamiaceae family may show cross-sensitivity to Melissa Officinalis. This includes common culinary herbs. If a patient has reacted to peppermint oil or topical rosemary preparations, they should undergo skin testing with the allergenic extract before using oral or highly concentrated forms of Lemon Balm.
> Important: Your healthcare provider will evaluate your complete medical history before prescribing Melissa Officinalis.
Melissa Officinalis is categorized as Category B3 (by some international standards) or 'Use with Caution' due to insufficient human data. While animal studies have not demonstrated clear teratogenicity (birth defects), the herb's effect on the endocrine system (specifically the thyroid) could theoretically impact fetal development, as maternal thyroid hormones are critical for fetal brain growth. It is generally recommended to avoid use during the first trimester.
It is unknown whether the active constituents of Melissa Officinalis, such as rosmarinic acid, are excreted in human breast milk. Because the neonatal nervous system is highly sensitive, there is a theoretical risk of sedation or poor feeding in the nursing infant. Healthcare providers typically recommend avoiding use while breastfeeding or monitoring the infant closely for excessive sleepiness.
Melissa Officinalis has a history of use in traditional 'gripe water' for colic. However, standardized clinical data for children is sparse. It is NOT approved for use in children under 3 years of age for anxiety or sleep. In older children, it should only be used for short durations (less than 1 week) under the guidance of a pediatrician. Long-term effects on the developing endocrine system are unknown.
Elderly patients (age 65+) are at an increased risk for adverse effects. Age-related declines in renal and hepatic function may lead to slower clearance of the extract. Furthermore, the sedative properties increase the risk of falls and hip fractures. Polypharmacy is also a major concern, as many seniors take medications for blood pressure, thyroid, or sleep that interact with Melissa Officinalis.
In patients with a Glomerular Filtration Rate (GFR) below 30 mL/min, the clearance of glucuronidated metabolites may be reduced. While no formal dose-adjustment tables exist, a 50% reduction in the standard starting dose is often recommended by clinical pharmacologists to prevent accumulation.
For patients with Child-Pugh Class B or C hepatic impairment, the half-life of the extract's phenolic components may be significantly prolonged. Monitoring for signs of CNS depression is essential, and dosing frequency should be reduced (e.g., once daily instead of three times daily).
> Important: Special populations require individualized medical assessment.
Melissa Officinalis exerts its effects through multiple molecular pathways. The primary active component, rosmarinic acid, acts as a potent inhibitor of GABA-transaminase (GABA-T). By preventing the breakdown of GABA, the extract increases inhibitory tone in the CNS. Additionally, the volatile oils (citral, citronellal) may modulate the NMDA receptor complex and interact with cholinergic systems. In its role as an allergenic extract, it functions as an antigen that binds to IgE on sensitized mast cells, providing a diagnostic signal for clinicians.
The onset of the anxiolytic effect is typically observed within 30 to 60 minutes of oral administration. The duration of effect is approximately 4 to 6 hours. There is a dose-response relationship; however, very high doses may lead to paradoxical effects or excessive sedation. Tolerance to the sedative effects may develop with chronic, uninterrupted use over several months.
| Parameter | Value |
|---|---|
| Bioavailability | < 5% (as rosmarinic acid) |
| Protein Binding | ~40% - 60% |
| Half-life | 1.5 - 4 hours |
| Tmax | 1 - 2 hours |
| Metabolism | Hepatic (Glucuronidation/Sulfation) |
| Excretion | Renal (>80%), Fecal (<20%) |
Melissa Officinalis is classified as a Non-Standardized Plant Allergenic Extract [EPC]. Within the therapeutic realm, it is often grouped with 'Nervines' or 'Phytotherapeutic Sedatives.' It shares similarities with other Lamiaceae members but is unique in its specific concentration of rosmarinic acid and its FDA classification for diagnostic use.
Medications containing this ingredient
Common questions about Melissa Officinalis
Melissa Officinalis, commonly known as Lemon Balm, is primarily used in clinical settings as an allergenic extract for diagnostic allergy testing. Beyond this, it is frequently used as a dietary supplement to manage symptoms of mild anxiety, stress, and sleep disturbances. Some topical formulations are also used to treat cold sores caused by the Herpes Simplex Virus. It works by increasing GABA levels in the brain and providing mild antiviral activity. Always consult a healthcare provider before using it for any medical purpose.
The most common side effects include increased appetite, nausea, dizziness, and excessive sleepiness. Some patients may also experience mild abdominal pain or a headache when first starting the supplement. When used for skin testing, a localized itchy red bump (wheal) is a common diagnostic reaction. Most side effects are mild and resolve quickly after the body adjusts or the dose is reduced. If side effects persist, you should contact your doctor.
No, it is strongly recommended that you avoid alcohol while taking Melissa Officinalis. Both alcohol and Lemon Balm act as central nervous system depressants, meaning they slow down brain activity. Combining them can lead to dangerous levels of sedation, impaired motor skills, and an increased risk of respiratory depression. This combination also significantly increases the risk of accidental falls or injuries. Always prioritize safety and discuss lifestyle choices with your healthcare provider.
The safety of Melissa Officinalis during pregnancy has not been clearly established through large-scale clinical trials. There is a theoretical concern that it could interfere with maternal thyroid function, which is vital for the healthy development of the baby's brain. Most healthcare providers advise avoiding its use during pregnancy, especially in the first trimester, unless specifically directed by a doctor. If you are pregnant or planning to become pregnant, discuss alternative options for anxiety or sleep with your obstetrician. Caution is always the preferred approach in prenatal care.
For acute symptoms like anxiety or trouble sleeping, Melissa Officinalis typically begins to work within 30 to 60 minutes after oral ingestion. The peak effect is usually reached within two hours. For topical use on cold sores, it may take several days of consistent application to see a reduction in lesion size and pain. If you are using it for long-term stress management, it may take 2 to 4 weeks of regular use to notice a significant improvement in overall well-being. Always follow the specific timing instructions provided by your healthcare provider.
While Melissa Officinalis is not known to be addictive, stopping it suddenly after long-term use may cause 'rebound' symptoms. This means the anxiety or insomnia you were treating could return temporarily or feel more intense. It is generally best to gradually reduce your dose over a week if you have been taking it daily for more than a month. Sudden discontinuation is not dangerous in the same way as stopping benzodiazepines, but a taper is more comfortable. Consult your healthcare provider for a personalized discontinuation plan.
If you miss a dose, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed one and continue with your regular schedule. You should never take two doses at once to make up for a missed one, as this can lead to excessive drowsiness or other side effects. Keeping a consistent schedule helps maintain steady levels of the extract in your system. If you frequently miss doses, consider using a pill reminder or alarm.
Melissa Officinalis is not directly linked to metabolic weight gain in the same way as some antipsychotics or steroids. However, one of its common side effects is an increase in appetite, which could lead to weight gain if calorie intake increases significantly. Additionally, its potential effect on suppressing thyroid function could theoretically slow down metabolism over a long period. If you notice unexplained weight gain while taking this supplement, have your thyroid levels checked by a doctor. Monitoring your diet and activity levels can help manage any appetite changes.
Melissa Officinalis can interact with several types of medications, particularly those for thyroid disorders, anxiety, and sleep. It can enhance the effects of sedatives like benzodiazepines and may interfere with the effectiveness of thyroid replacement therapy like levothyroxine. There is also a potential for interaction with medications that lower blood sugar or blood pressure. Because of these risks, it is vital to provide your doctor with a full list of all medications and supplements you are currently taking. They can help you avoid dangerous combinations.
Melissa Officinalis is a botanical substance and is widely available under its common name, Lemon Balm, as a generic herbal supplement. In the clinical context of allergenic extracts, various manufacturers produce non-standardized versions for diagnostic use. There is no single 'brand name' version that holds a patent, making it generally affordable and accessible. However, the quality and concentration of active ingredients can vary significantly between different generic brands. It is best to choose a product that has been third-party tested for purity and potency.