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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Food Allergenic Extract [EPC]
Peach (Non-Standardized Food Allergenic Extract) is a diagnostic tool used by healthcare providers to identify IgE-mediated hypersensitivity to peach proteins through skin testing.
Name
Peach
Raw Name
PEACH
Category
Non-Standardized Food Allergenic Extract [EPC]
Drug Count
4
Variant Count
4
Last Verified
February 17, 2026
About Peach
Peach (Non-Standardized Food Allergenic Extract) is a diagnostic tool used by healthcare providers to identify IgE-mediated hypersensitivity to peach proteins through skin testing.
Detailed information about Peach
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Peach.
In clinical practice, Peach extract is used to confirm a suspected allergy in patients who experience symptoms such as oral allergy syndrome, hives, or anaphylaxis after consuming peaches. It is essential to understand that this extract is a concentrated form of the proteins found in the fruit, designed to elicit a controlled immune response in a clinical setting. Healthcare providers use this tool to navigate the complexities of Pollen Food Allergy Syndrome (PFAS), where patients allergic to birch pollen may cross-react with peach proteins due to structural similarities in the allergens.
The mechanism of action for Peach allergenic extract is centered on the Type I hypersensitivity reaction (immediate hypersensitivity). When the extract is introduced into the skin via percutaneous (scratch or prick) or intradermal (injection into the dermis) methods, it encounters mast cells that are 'sensitized' with IgE antibodies specific to peach proteins. If the patient is allergic, these IgE antibodies recognize the peach allergens (such as Pru p 1, Pru p 3, or Pru p 4).
At the molecular level, the allergens cross-link the IgE antibodies bound to high-affinity receptors (FcεRI) on the surface of mast cells and basophils. This cross-linking triggers a signal transduction cascade that leads to degranulation—the release of preformed inflammatory mediators like histamine, proteases, and heparin, as well as the de novo synthesis of leukotrienes and prostaglandins. In the skin, this localized release causes vasodilation (redness or 'flare') and increased capillary permeability (swelling or 'wheal'). The resulting 'wheal and flare' reaction is the clinical endpoint measured by the healthcare provider to determine sensitivity.
Peach allergenic extract is FDA-approved for the following indications:
Off-label uses may include specialized research protocols for oral immunotherapy (OIT) or component-resolved diagnostics, though these are typically performed in highly controlled academic settings.
> Important: Only your healthcare provider can determine if Peach allergenic extract testing is right for your specific condition. This testing must be performed in a facility equipped to handle emergency allergic reactions.
For diagnostic purposes, the dosage of Peach allergenic extract is not measured in milligrams but in small, controlled volumes applied to the skin.
Peach allergenic extract is used in children; however, the number of skin tests performed at one time may be limited to prevent excessive discomfort or systemic absorption. The procedure for SPT and intradermal testing in children is identical to that in adults, though the back is often the preferred site for infants to prevent them from touching the test area.
No dosage adjustments are required for patients with renal impairment, as the systemic exposure is minimal.
No dosage adjustments are required for patients with hepatic impairment.
Elderly patients may have reduced skin reactivity (decreased mast cell density or skin turgor). Healthcare providers may need to interpret results more cautiously, as the wheal size may be smaller than in younger adults.
Peach allergenic extract is never 'taken' by the patient in the traditional sense; it is administered exclusively by a trained medical professional.
As this is a diagnostic test performed during a scheduled office visit, missed doses are not applicable. If a testing session is interrupted, the healthcare provider will determine when it is safe to restart.
An 'overdose' in the context of allergenic extracts refers to the administration of too much extract or an accidental systemic injection.
> Important: Follow your healthcare provider's instructions regarding the discontinuation of medications like antihistamines before the test. Do not attempt to use these extracts outside of a clinical environment.
The most common side effects of Peach allergenic extract are localized to the site of testing. These are expected responses and include:
> Warning: Stop the procedure and call for emergency assistance immediately if you experience any of these symptoms during or after testing:
There are no known long-term side effects associated with the one-time diagnostic use of Peach allergenic extract. However, repeated exposure in the context of immunotherapy (if applicable) can lead to a persistent increase in IgG4 antibodies, which is a normal part of the desensitization process.
Peach allergenic extract can cause severe systemic allergic reactions, including anaphylaxis, which may be fatal.
Report any unusual symptoms to your healthcare provider immediately.
Peach allergenic extract is a potent biological substance. It is only intended for use by specialists in allergy and immunology. The primary safety concern is the potential for a localized reaction to escalate into a systemic one. Patients must provide a full medical history, specifically focusing on previous reactions to peaches and current medications.
No FDA black box warnings are specifically listed for 'Peach' in the same way they are for standardized grass/ragweed sublingual tablets, but all allergenic extracts carry an inherent warning regarding the risk of anaphylaxis. The FDA-approved labeling emphasizes that these products must be used only by physicians trained in emergency resuscitation.
Most patients can drive after skin testing. However, if a systemic reaction occurs or if the patient receives antihistamines or epinephrine, they should not drive or operate machinery until the medication effects have fully cleared and they are cleared by a physician.
Alcohol consumption should be avoided for 24 hours before and after testing. Alcohol can increase peripheral blood flow and potentially enhance the rate of allergen absorption or lower the threshold for mast cell degranulation.
As a diagnostic test, there is no tapering required. However, if a patient is undergoing a series of tests and experiences a systemic reaction, the testing protocol must be immediately discontinued.
> Important: Discuss all your medical conditions, especially heart or lung problems, with your healthcare provider before starting Peach extract testing.
There are no absolute drug-drug contraindications that prevent the use of Peach extract, but certain medications make the test dangerous or unreadable:
Peach allergenic extract testing does not interfere with standard blood chemistries. However, it is often performed in conjunction with Serum Specific IgE (sIgE) blood tests (formerly RAST). The skin test is generally considered more sensitive than the blood test.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, especially any allergy or cold medications.
Peach allergenic extract should NEVER be used in the following circumstances:
Patients allergic to Peach extract may also react to:
> Important: Your healthcare provider will evaluate your complete medical history and current health status before deciding to proceed with Peach extract testing.
Peach allergenic extract is classified as FDA Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. The primary risk is not the extract itself, but the potential for a systemic reaction (anaphylaxis) which can lead to maternal hypoxia and placental hypoperfusion. Epinephrine, the treatment of choice for anaphylaxis, can also decrease uterine blood flow. Therefore, diagnostic skin testing is typically postponed until after delivery unless the information is critical for the patient's immediate management.
It is unknown whether the components of Peach allergenic extract are excreted in human milk. Because systemic absorption from skin testing is minimal, it is generally considered low-risk for nursing infants. However, the decision to test should be made in consultation with a healthcare provider, considering the mother's need for the diagnosis.
Peach extract is safe for use in children, including infants. However, healthcare providers must be cautious regarding the number of skin tests performed to avoid overwhelming the child. In children with severe atopic dermatitis (eczema), finding clear skin for testing can be challenging. The diagnostic accuracy in very young children (under age 2) may be slightly lower due to developing immune systems.
Clinical studies of Peach allergenic extract did not include sufficient numbers of subjects aged 65 and over to determine if they respond differently than younger subjects. In general, skin reactivity decreases with age. Furthermore, elderly patients are more likely to be on medications (like beta-blockers or ACE inhibitors) that increase the risk of complications from a systemic reaction.
No specific studies have been conducted in patients with renal impairment. However, given the localized nature of the test and the proteinaceous structure of the allergens, no dose adjustments or special precautions are typically required for patients with kidney disease.
No specific studies have been conducted in patients with hepatic impairment. The extract is not metabolized by the liver, so no adjustments are necessary.
> Important: Special populations require individualized medical assessment to ensure the benefits of diagnostic testing outweigh the potential risks.
Peach allergenic extract acts as a source of specific antigens. The primary allergens in peach include Pru p 1 (a PR-10 protein related to birch pollen), Pru p 3 (a Lipid Transfer Protein or LTP), and Pru p 4 (a profilin). Pru p 3 is particularly significant as it is heat-stable and resistant to digestion, often leading to more severe systemic reactions compared to Pru p 1, which typically causes only oral symptoms. The extract works by cross-linking IgE molecules on the surface of cutaneous mast cells, leading to the immediate release of histamine and other mediators that produce the visible wheal and flare response.
| Parameter | Value |
|---|---|
| Bioavailability | Negligible (Percutaneous) |
| Protein Binding | N/A (Localized) |
| Half-life | ~30-60 minutes (Local tissue) |
| Tmax | 15-20 minutes (Skin reaction) |
| Metabolism | Local Proteolysis |
| Excretion | Lymphatic clearance |
Peach extract is classified as a Non-Standardized Food Allergenic Extract. It belongs to the broader category of 'Allergenics' used for diagnosis and sometimes immunotherapy. Related medications include extracts for apple, cherry, and various tree pollens.
Common questions about Peach
Peach allergenic extract is primarily used as a diagnostic tool to identify if a person has a true IgE-mediated allergy to peaches. It is administered by an allergist through skin prick testing or intradermal testing to observe the body's immediate immune response. This is particularly helpful for patients who experience itching, swelling, or hives after eating peaches. It also helps doctors distinguish between a primary peach allergy and cross-reactivity caused by birch pollen allergy. The results of this test help in creating a management plan to avoid potentially life-threatening reactions.
The most common side effects are localized to the area where the test was performed. Most patients will experience itching, redness, and a small raised bump known as a wheal, which looks similar to a mosquito bite. These symptoms usually peak within 15 to 20 minutes and fade within an hour or two. Some patients may also experience a 'late-phase' reaction where the area becomes red and slightly swollen several hours later. Because the test uses a very small amount of allergen, systemic side effects are rare but possible.
Alcohol should be avoided for at least 24 hours before and after undergoing allergy testing with Peach extract. Alcohol can increase blood flow to the skin and may affect the accuracy of the test results by making the skin more reactive. Furthermore, alcohol can potentially lower the threshold for a severe allergic reaction, making it more dangerous if you happen to have a systemic response to the extract. Always follow the specific pre-test instructions provided by your allergist. If you have consumed alcohol recently, be sure to inform your healthcare provider before the test begins.
Allergy skin testing with Peach extract is generally avoided during pregnancy. While the extract itself does not directly harm the fetus, a severe allergic reaction (anaphylaxis) in the mother could lead to a dangerous drop in oxygen levels for the baby. Additionally, the emergency medications used to treat such a reaction, like epinephrine, can affect blood flow to the uterus. Most allergists recommend waiting until after delivery to perform skin testing unless the diagnosis is absolutely essential for the mother's immediate health. Discuss the risks and benefits with your obstetrician and allergist.
When used for diagnostic skin testing, Peach allergenic extract works very quickly. The initial skin response usually begins within 5 minutes of the prick or injection. The maximum reaction, which is when the healthcare provider will measure the size of the wheal and flare, typically occurs between 15 and 20 minutes after application. If no reaction is seen after 20 minutes, the test is generally considered negative for that specific concentration. The entire process, including the mandatory 30-minute observation period afterward, usually takes about an hour.
Peach allergenic extract is not a daily medication that you take; it is a diagnostic tool used once during a medical appointment. Therefore, there is no 'stopping' the medication in the traditional sense. If you are undergoing a series of tests and feel unwell, the doctor will stop the procedure immediately. There are no withdrawal symptoms or long-term effects from having a skin test performed. Once the test is over and the observation period is complete, no further doses are administered.
Since Peach extract is administered only by healthcare professionals during a scheduled diagnostic procedure, you cannot 'miss a dose' at home. If you miss your appointment for allergy testing, you should simply reschedule with your allergist. It is important to remember that if you have rescheduled, you must continue to avoid eating peaches until the test can be completed and your doctor provides a diagnosis. Ensure you follow the instructions for stopping antihistamines again before your new appointment date.
No, Peach allergenic extract does not cause weight gain. It is a diagnostic protein extract applied in minute quantities to the skin once or twice during a clinical visit. It does not have the metabolic or hormonal effects associated with medications that cause weight gain, such as certain steroids or antidepressants. Any localized swelling at the test site is temporary and consists of fluid (edema) related to the allergic response, which resolves within hours. There is no evidence linking allergenic extract testing to changes in body weight.
Peach extract testing can be affected by several medications, particularly antihistamines like Zyrtec, Claritin, or Benadryl, which must be stopped several days before the test. Other medications, such as beta-blockers used for heart conditions or blood pressure, do not change the test results but can make it much harder to treat a severe reaction if one occurs. Tricyclic antidepressants and certain heartburn medications (H2 blockers) can also interfere with the skin's reactivity. Always provide your allergist with a complete list of all medications and supplements you are currently taking.
Allergenic extracts like Peach are biological products rather than traditional chemical drugs, so the term 'generic' is not used in the same way. However, several different manufacturers produce Peach allergenic extracts, such as Greer Laboratories or HollisterStier. These products are considered essentially equivalent for diagnostic purposes, although they are 'non-standardized,' meaning their exact protein concentrations may vary slightly between brands. Your allergist will choose a high-quality, FDA-regulated extract for your testing procedure.