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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Standardized Chemical Allergen [EPC]
Melissa Officinalis Whole is a standardized chemical allergen and plant extract used primarily in the diagnosis and treatment of hypersensitivity. It belongs to the class of non-standardized plant allergenic extracts.
Name
Melissa Officinalis Whole
Raw Name
MELISSA OFFICINALIS WHOLE
Category
Standardized Chemical Allergen [EPC]
Drug Count
5
Variant Count
5
Last Verified
February 17, 2026
About Melissa Officinalis Whole
Melissa Officinalis Whole is a standardized chemical allergen and plant extract used primarily in the diagnosis and treatment of hypersensitivity. It belongs to the class of non-standardized plant allergenic extracts.
Detailed information about Melissa Officinalis Whole
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 Whole.
Melissa Officinalis Whole, commonly known as Lemon Balm, is a perennial herb in the mint family (Lamiaceae). In a clinical and pharmacological context, particularly when classified as a Standardized Chemical Allergen [EPC], it refers to a specific preparation of the entire plant used for medical diagnostic and therapeutic purposes. It belongs to a class of drugs called Allergenic Extracts, which are used to identify or treat allergic reactions to specific substances.
While the general public often recognizes Melissa Officinalis as a botanical supplement for sleep or anxiety, the clinical designation 'Melissa Officinalis Whole' in the context of the Established Pharmacologic Class (EPC) refers to its role as a diagnostic tool in allergy and immunology. These extracts are regulated by the FDA's Center for Biologics Evaluation and Research (CBER). The extract contains the complex proteins, volatile oils (such as citral and citronellal), and polyphenols (such as rosmarinic acid) that are indigenous to the plant. When used as a diagnostic agent, it is intended to elicit a controlled immune response in patients suspected of having a Type I hypersensitivity (an immediate-type allergic reaction) to the plant or its constituents.
Historically, the FDA has overseen the production of allergenic extracts to ensure they maintain a level of potency that allows for consistent diagnostic results. Melissa Officinalis Whole extracts are often used in skin prick testing (SPT) or intradermal testing to confirm clinical sensitivity in patients who report localized or systemic symptoms upon exposure to the plant in agricultural, culinary, or medicinal settings.
The mechanism of action for Melissa Officinalis Whole as an allergenic extract is rooted in the principles of immunology, specifically the Type I Hypersensitivity Pathway. When the extract is introduced into the skin via a prick or injection, the specific allergens (usually proteins or glycoproteins) within the extract cross-link with specific Immunoglobulin E (IgE) antibodies. These IgE antibodies are bound to the surface of mast cells in the skin and basophils in the blood.
At the molecular level, this cross-linking triggers a process called degranulation. During degranulation, mast cells release pre-formed inflammatory mediators into the surrounding tissue. The most prominent of these is histamine, but it also includes leukotrienes, prostaglandins, and various cytokines. This release causes local vasodilation (widening of blood vessels) and increased capillary permeability, which manifests clinically as the 'wheal and flare' reaction. The 'wheal' is the raised, fluid-filled bump, and the 'flare' is the surrounding redness caused by increased blood flow. By measuring the size of this reaction against a positive control (histamine) and a negative control (saline), healthcare providers can determine if a patient is sensitized to Melissa Officinalis.
Unlike systemic drugs taken orally or intravenously, the pharmacokinetics of allergenic extracts used for skin testing are localized and minimal by design.
Melissa Officinalis Whole is primarily utilized for the following indications:
Melissa Officinalis Whole is typically available in the following pharmaceutical forms:
> Important: Only your healthcare provider can determine if Melissa Officinalis Whole is right for your specific condition. The use of allergenic extracts must be performed by trained medical professionals in a facility equipped to handle emergency allergic reactions.
Dosage for Melissa Officinalis Whole is not calculated like traditional medications (e.g., mg/kg). Instead, it is based on biological potency or weight/volume (w/v) concentrations.
Melissa Officinalis Whole is generally considered safe for use in children for diagnostic purposes, provided it is administered by a pediatric allergist.
No dosage adjustments are necessary for patients with renal impairment, as the systemic absorption of the diagnostic extract is negligible and it is not cleared by the kidneys in a manner that would affect its safety or efficacy.
No dosage adjustments are required for patients with hepatic impairment. The local mechanism of action does not involve hepatic metabolism.
In elderly patients (over 65 years), skin reactivity may be diminished due to age-related changes in skin turgor and mast cell density. While no dose adjustment is needed, healthcare providers should be aware that a smaller wheal size may still indicate a significant allergy.
Melissa Officinalis Whole extract is not for self-administration. It must be administered by a healthcare professional in a clinical setting.
In the context of diagnostic testing, a missed dose simply means the test must be rescheduled. For immunotherapy, a missed dose can be critical. If a maintenance or escalation injection is missed, the next dose may need to be reduced to prevent an allergic reaction. Patients should contact their allergist immediately if a scheduled injection is missed.
An 'overdose' in the context of an allergenic extract refers to the administration of too much extract or a concentration that is too high for the patient's sensitivity level.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or attempt to use these extracts at home without medical guidance.
Because Melissa Officinalis Whole is designed to elicit an immune response, local reactions are expected and very common.
> Warning: Stop taking Melissa Officinalis Whole and call your doctor immediately if you experience any of these symptoms of Anaphylaxis.
When used only for diagnostic purposes, there are no known long-term side effects of Melissa Officinalis Whole. If used as part of long-term immunotherapy, patients may rarely develop a permanent increase in sensitivity to the allergen or, conversely, may develop a desired long-term tolerance. There is no evidence that diagnostic use leads to the development of new allergies (sensitization).
Melissa Officinalis Whole extracts, like all allergenic extracts, carry a significant risk of severe systemic reactions.
Report any unusual symptoms to your healthcare provider. Even a small local reaction can sometimes precede a more serious systemic reaction in highly sensitive individuals.
Melissa Officinalis Whole must be used with extreme caution. The primary safety concern is the risk of an IgE-mediated systemic allergic reaction. All testing and treatment must be conducted in a medical facility where an emergency kit, including epinephrine, is immediately available. Patients should be observed for at least 30 minutes following any administration of the extract.
No FDA black box warnings for Melissa Officinalis Whole specifically as a standalone drug, but it falls under the general class warning for Allergenic Extracts. The class warning emphasizes that these products are intended for use by physicians experienced in the diagnosis and treatment of allergies. Severe, life-threatening systemic reactions, including anaphylactic shock and death, can occur.
Generally, Melissa Officinalis Whole does not affect the ability to drive or operate machinery. However, if a patient experiences a vasovagal reaction (fainting) or a systemic allergic reaction, they should not drive until they are fully recovered and cleared by a physician.
There is no direct interaction between alcohol and Melissa Officinalis Whole extract. However, alcohol consumption can cause vasodilation and may theoretically increase the rate of absorption of the allergen or worsen the symptoms of an allergic reaction. It is best to avoid alcohol for several hours before and after allergy testing.
Discontinuing the use of Melissa Officinalis Whole for diagnostic purposes has no withdrawal effects. In immunotherapy, stopping treatment will result in a gradual loss of the built-up tolerance to the allergen, and symptoms upon natural exposure to lemon balm may return.
> Important: Discuss all your medical conditions with your healthcare provider before starting Melissa Officinalis Whole. Ensure your doctor knows if you have a history of heart disease or fainting.
There are no drugs that are strictly 'contraindicated' in the sense of causing a chemical reaction with the extract, but certain drugs make the use of the extract unsafe or ineffective:
These drugs do not make the test unsafe, but they interfere with the results (causing false negatives):
Melissa Officinalis Whole does not typically interfere with standard blood chemistry or hematology tests. Its only interaction is with Skin Prick Tests and Serum Specific IgE tests (RAST/ImmunoCAP), where the presence of the extract in the body's system (during immunotherapy) is intended to change these results over time.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, especially any 'allergy pills' or 'cold and sinus' medications.
Melissa Officinalis Whole must NEVER be used in the following situations:
Conditions requiring careful risk-benefit analysis include:
Patients with known allergies to other members of the Lamiaceae (Mint) family may show cross-sensitivity to Melissa Officinalis Whole. This includes:
> Important: Your healthcare provider will evaluate your complete medical history before prescribing or administering Melissa Officinalis Whole.
Pregnancy Category C: Animal reproduction studies have not been conducted with Melissa Officinalis Whole. It is not known whether the extract can cause fetal harm when administered to a pregnant woman. The primary concern is not the extract itself, but the potential for maternal anaphylaxis, which can lead to a sudden drop in blood pressure and oxygen delivery to the fetus, resulting in miscarriage or neurological damage. Consequently, most allergists recommend against starting new allergy testing or increasing immunotherapy doses during pregnancy.
It is not known whether the allergenic components of Melissa Officinalis Whole are excreted in human milk. Because systemic absorption from skin testing is so low, it is generally considered unlikely to affect a nursing infant. However, the decision to test should be made after a risk-benefit discussion with a healthcare provider.
Melissa Officinalis Whole is used in children as young as infants for diagnostic purposes.
In patients over 65, the skin's reactivity to histamine and allergens typically decreases. This may lead to smaller wheal diameters, which could be misinterpreted as a negative result. Furthermore, elderly patients are more likely to have underlying cardiovascular disease, making them more vulnerable to the side effects of epinephrine if a systemic reaction occurs.
No adjustments are needed. The proteins in the extract are not cleared by the kidneys in a way that would lead to accumulation or toxicity in patients with GFR (Glomerular Filtration Rate) reductions.
No adjustments are needed. The liver does not play a significant role in the clearance of the small amounts of protein introduced during diagnostic testing.
> Important: Special populations require individualized medical assessment to ensure the benefits of diagnostic clarity outweigh the risks of the procedure.
Melissa Officinalis Whole acts as an antigen. Specifically, it provides the epitopes (binding sites) necessary to cross-link IgE antibodies on the surface of mast cells. This cross-linking activates the high-affinity IgE receptor (FcεRI), leading to an influx of calcium ions and the subsequent degranulation of the cell. This release of mediators (histamine, tryptase, heparin) causes the localized inflammatory response used for diagnosis.
| Parameter | Value |
|---|---|
| Bioavailability | Negligible (Epicutaneous) |
| Protein Binding | N/A (Local tissue interaction) |
| Half-life | ~20-30 minutes (Local mediators) |
| Tmax | 15-20 minutes |
| Metabolism | Proteolytic degradation in tissue |
| Excretion | Lymphatic clearance |
Melissa Officinalis Whole is classified as a Standardized Chemical Allergen [EPC] and a Non-Standardized Plant Allergenic Extract [EPC]. It is grouped with other botanical extracts like Mentha piperita and Salvia officinalis.
Common questions about Melissa Officinalis Whole
Melissa Officinalis Whole is primarily used as a diagnostic tool by allergists to determine if a patient has an allergy to lemon balm. It is administered through a skin prick test or an intradermal injection to see if it triggers a localized allergic reaction. In some cases, it may also be used in immunotherapy to help desensitize a patient to the plant over time. It is not used to treat symptoms directly like an antihistamine would. Instead, it helps identify the cause of allergic symptoms so they can be managed.
The most common side effects are localized to the site of the skin test and include intense itching, redness, and the formation of a raised bump called a wheal. These reactions are actually the intended result of a positive test and usually appear within 15 minutes. Some patients may also experience a mild burning sensation from the glycerin in the extract. These local symptoms typically fade within an hour or two. Rarely, a patient might experience a delayed swelling at the site several hours later.
It is generally advised to avoid alcohol for at least 24 hours before and after receiving a Melissa Officinalis Whole skin test or injection. Alcohol can cause your blood vessels to dilate, which might increase the rate at which the allergen is absorbed into your system. This could potentially increase the risk of a systemic allergic reaction or make a local reaction more severe. Additionally, alcohol can interfere with your ability to notice early signs of a serious reaction. Always follow the specific pre-test instructions provided by your allergist.
Melissa Officinalis Whole is usually avoided during pregnancy unless the diagnostic need is urgent. While the extract itself is not known to be toxic to the fetus, the risk of the mother having a severe allergic reaction (anaphylaxis) is a major concern. Anaphylaxis can cause a dangerous drop in the mother's blood pressure, which reduces the oxygen supply to the baby. Most doctors prefer to wait until after the baby is born to perform allergy testing. If you are already on a maintenance dose of immunotherapy, your doctor may choose to continue it but will not increase the dose.
When used for diagnostic skin testing, Melissa Officinalis Whole works very quickly, with results appearing in about 15 to 20 minutes. The healthcare provider will prick the skin and then observe the area for the development of a wheal and flare. If the test is being used for immunotherapy (allergy shots), it takes much longer to see a benefit. Patients usually require several months of weekly injections before their immune system begins to show increased tolerance to the allergen. The full effect of immunotherapy may not be reached for one to three years.
If you are undergoing diagnostic testing, there is no issue with 'stopping' as it is a one-time procedure. However, if you are receiving Melissa Officinalis Whole as part of an immunotherapy program, stopping suddenly will cause you to lose the allergic tolerance you have built up. You will not experience 'withdrawal' symptoms like you might with some medications, but your original allergy symptoms will likely return when you are exposed to lemon balm in the environment. If you need to stop treatment, always discuss a plan with your allergist first.
If you miss an appointment for a diagnostic skin test, you can simply reschedule it for a later date. However, if you miss a scheduled immunotherapy injection, you must contact your allergist's office for instructions. Missing a dose during the 'build-up' phase may require you to repeat the previous dose or even go back to a lower concentration to ensure safety. You should never try to 'double up' on doses to make up for a missed one, as this significantly increases the risk of a severe allergic reaction.
There is no clinical evidence to suggest that Melissa Officinalis Whole allergenic extract causes weight gain. Unlike some systemic medications like oral steroids or certain antidepressants, allergenic extracts do not affect your metabolism, appetite, or fat storage. The amount of extract used in testing or immunotherapy is extremely small and acts locally on the immune system. If you notice weight changes while undergoing allergy treatment, it is likely due to other factors or medications you may be taking, and you should discuss it with your doctor.
Melissa Officinalis Whole can be administered while you are taking many other medications, but some drugs can interfere with the results or safety. Antihistamines, tricyclic antidepressants, and some sleep aids must be stopped several days before testing because they can prevent the skin from reacting, leading to a false negative. More importantly, beta-blockers used for heart conditions can make it difficult to treat a serious allergic reaction if one occurs. Always provide your allergist with a complete list of every medication and supplement you use before you begin testing.
Allergenic extracts like Melissa Officinalis Whole are biological products rather than simple chemical drugs, so the term 'generic' is not used in the same way. However, several different biological manufacturers may produce their own versions of Lemon Balm extract. These are generally considered interchangeable for diagnostic purposes if they are prepared to the same weight/volume or potency standards. Your allergist will typically use a brand they trust for consistency and stability. These extracts are not available for purchase by the general public and must be ordered by a licensed medical professional.