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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Pollen Allergenic Extract [EPC]
Quercus Virginiana Pollen is a non-standardized allergenic extract used for the diagnosis and immunotherapy-based treatment of Southern Live Oak pollen allergies.
Name
Quercus Virginiana Pollen
Raw Name
QUERCUS VIRGINIANA POLLEN
Category
Non-Standardized Pollen Allergenic Extract [EPC]
Drug Count
8
Variant Count
9
Last Verified
February 17, 2026
About Quercus Virginiana Pollen
Quercus Virginiana Pollen is a non-standardized allergenic extract used for the diagnosis and immunotherapy-based treatment of Southern Live Oak pollen allergies.
Detailed information about Quercus Virginiana Pollen
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 Quercus Virginiana Pollen.
In clinical practice, this extract is utilized for two primary purposes: the diagnosis of hypersensitivity (allergic) reactions and the administration of allergen immunotherapy (AIT), often referred to as 'allergy shots.' As a non-standardized extract, its potency is typically measured in Weight/Volume (w/v) ratios or Protein Nitrogen Units (PNU), rather than the Bioequivalent Allergy Units (BAU) used for standardized extracts like certain grasses or ragweed. The FDA has regulated these extracts for decades under the Center for Biologics Evaluation and Research (CBER), ensuring that the manufacturing process maintains consistent biological source material, even if the exact 'potency' varies slightly between lots compared to standardized medications.
Your healthcare provider, typically an allergist or immunologist, may use this extract if you exhibit symptoms of seasonal allergic rhinitis (hay fever) or allergic asthma during the spring months when oak trees release their pollen. It is important to understand that Quercus Virginiana Pollen is not a medication that masks symptoms, such as an antihistamine; rather, it is a biological tool used to identify and potentially modify the underlying immune response to the Southern Live Oak tree.
The mechanism of Quercus Virginiana Pollen extract depends on its application. For diagnostic purposes (skin testing), the extract is introduced into the skin's epidermal or dermal layers. If the patient has pre-existing IgE (Immunoglobulin E) antibodies specific to Southern Live Oak proteins, these antibodies—which are bound to mast cells in the skin—will recognize the pollen proteins. This recognition triggers the mast cells to degranulate, releasing inflammatory mediators like histamine. This results in a 'wheal and flare' reaction (a raised bump surrounded by redness), confirming the patient's sensitivity.
In the context of Allergen Immunotherapy (AIT), the mechanism is more complex and involves a process called desensitization or immune tolerance. When the extract is injected subcutaneously (under the skin) in gradually increasing doses, it induces a shift in the immune system's response. Specifically, it promotes the production of 'blocking antibodies' known as IgG4 (Immunoglobulin G4). These IgG4 antibodies compete with IgE for the pollen allergens, effectively neutralizing the allergen before it can trigger an allergic reaction. Furthermore, long-term immunotherapy leads to the induction of regulatory T-cells (Tregs) and a shift from a Th2-biased immune response (which promotes allergy) to a Th1-biased response. This molecular reprogramming reduces the sensitivity of mast cells and basophils, leading to long-term relief from allergy symptoms even after the treatment is discontinued.
Unlike traditional small-molecule drugs (like ibuprofen or lisinopril), allergenic extracts are complex mixtures of proteins and glycoproteins. Therefore, traditional pharmacokinetics—measuring blood levels of a specific chemical—do not apply in the same way.
Quercus Virginiana Pollen extract is FDA-approved for the following indications:
Quercus Virginiana Pollen is available in the following forms:
> Important: Only your healthcare provider can determine if Quercus Virginiana Pollen is right for your specific condition. The administration of this extract must be performed under the supervision of a clinician prepared to manage severe systemic allergic reactions.
Dosage for Quercus Virginiana Pollen is highly individualized and is not based on a standard 'one-size-fits-all' milligram amount. Instead, the dose is determined by the patient's level of sensitivity and their clinical response to the extract.
For skin prick testing, a single drop of a glycerinated extract (typically 1:10 or 1:20 w/v) is applied to the skin. For intradermal testing, a much more dilute solution (0.02 mL to 0.05 mL of a 1:1000 or 1:500 w/v concentration) may be injected into the skin if the prick test is negative but the clinical history strongly suggests an allergy.
Treatment usually begins with a very low dose (e.g., 0.05 mL of a 1:10,000 w/v dilution). Injections are typically given once or twice a week. The dose is gradually increased ('escalated') based on the patient's tolerance until the 'maintenance dose' is reached. This phase usually lasts 3 to 6 months.
Once the target dose is reached (the highest dose the patient can tolerate without a significant local or systemic reaction), the frequency of injections is decreased to once every 2 to 4 weeks. This phase typically continues for 3 to 5 years to achieve long-term desensitization.
Quercus Virginiana Pollen is used in children, as allergies often manifest early in life. Dosing principles for children are generally the same as for adults, as the treatment is based on immunological sensitivity rather than body weight. However, healthcare providers may use a more cautious build-up schedule for very young children or those with a history of severe asthma.
No specific dosage adjustments are required for patients with renal impairment, as the proteins are metabolized by proteases. However, the patient's overall health must be stable to manage potential systemic reactions.
No dosage adjustments are required for hepatic impairment.
Elderly patients may be at higher risk for complications if a systemic reaction occurs, especially if they have underlying cardiovascular disease. Healthcare providers will carefully evaluate the risk-benefit ratio and may use a more conservative dosing schedule.
Quercus Virginiana Pollen extract is never self-administered by the patient at home. It must be administered by a healthcare professional in a clinical setting equipped with emergency supplies (including epinephrine, oxygen, and IV fluids).
In immunotherapy, consistency is vital. If a dose is missed during the build-up phase, the next dose may need to be reduced to ensure safety. If a dose is missed during the maintenance phase by more than a week or two, the allergist will typically reduce the dose and then gradually build it back up. Do not attempt to 'double up' on doses to make up for a missed one.
An 'overdose' in the context of allergenic extracts usually refers to an injection of a dose higher than the patient's current tolerance level. This can lead to a severe systemic reaction or anaphylaxis.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance. Always inform your doctor if you feel unwell on the day of your scheduled injection.
The most frequent side effects associated with Quercus Virginiana Pollen occur at the site of the injection. These are generally considered a normal part of the body's immune response to the extract.
These side effects are systemic, meaning they affect the whole body rather than just the injection site.
> Warning: Stop taking Quercus Virginiana Pollen and call your doctor immediately or seek emergency care if you experience any of these symptoms of anaphylaxis.
There are no known long-term 'toxic' effects of Quercus Virginiana Pollen extract on organs like the liver or kidneys. The primary long-term effect is the desired modulation of the immune system. However, patients who receive immunotherapy for many years may develop small areas of subcutaneous nodules (firm lumps under the skin) at the frequent injection sites. These are generally harmless but should be monitored by a physician.
While Quercus Virginiana Pollen is a non-standardized extract, it falls under the general class of allergenic extracts which carry significant risks.
FDA Warning Summary: Allergenic extracts can cause severe life-threatening systemic reactions, including anaphylaxis. These extracts should only be administered by healthcare professionals who are trained in the treatment of anaphylaxis and have the necessary equipment (epinephrine) available. Patients with unstable or severe asthma are at a higher risk for fatal reactions. A period of observation (minimum 30 minutes) is mandatory following every injection.
Report any unusual symptoms to your healthcare provider. Even a 'large' local reaction should be reported, as it may be a precursor to a systemic reaction at the next, higher dose.
Quercus Virginiana Pollen is intended only for patients with a clear clinical history of Southern Live Oak allergy and a positive skin test or in vitro (blood) test for IgE antibodies. It is not a general treatment for all types of oak or tree allergies, although some cross-reactivity may occur. Safety depends on accurate dosing and strict adherence to clinical protocols.
No FDA black box warnings specifically for 'Quercus Virginiana Pollen' exist as a unique entry, but the class-wide warning for Allergenic Extracts is strictly applied. This warning emphasizes that these products can cause severe, life-threatening anaphylaxis. Injections must be administered in a medical facility where the patient can be observed for at least 30 minutes. Patients with severe or poorly controlled asthma are at increased risk of a fatal outcome from a systemic reaction.
Most patients can drive themselves to and from their appointments. However, if a patient experiences a systemic reaction or feels dizzy/lightheaded after an injection, they should not drive until cleared by a medical professional.
There is no direct chemical interaction between alcohol and Quercus Virginiana Pollen. However, alcohol can cause vasodilation (widening of blood vessels), which may theoretically increase the speed at which an allergen is absorbed into the bloodstream, potentially increasing the risk of a systemic reaction. It is generally advised to avoid heavy alcohol consumption immediately before or after an injection.
Immunotherapy is typically discontinued after 3 to 5 years of successful maintenance. There is no 'withdrawal syndrome' associated with stopping allergenic extracts. However, if treatment is stopped prematurely (before 3 years), the allergy symptoms are more likely to return. If a patient decides to stop treatment, they should discuss the plan with their allergist.
> Important: Discuss all your medical conditions with your healthcare provider before starting Quercus Virginiana Pollen, especially if you have a history of heart disease or are taking blood pressure medications.
There are few absolute contraindications for drug combinations, but the following are highly discouraged:
For each major interaction, the mechanism is usually pharmacodynamic (affecting the body's response to the drug or the emergency treatment for the drug) rather than pharmacokinetic (affecting how the drug is metabolized). The clinical consequence is either a reduced ability to treat a side effect (beta-blockers) or an increased severity of a reaction (ACE inhibitors).
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, including over-the-counter allergy medications and eye drops.
Conditions where Quercus Virginiana Pollen must NEVER be used include:
Conditions requiring careful risk-benefit analysis by the allergist:
Quercus Virginiana Pollen contains proteins that are common to the Quercus genus. Patients allergic to Southern Live Oak are very likely to be cross-sensitive to:
This means that a patient allergic to one oak species will likely react to others, and the healthcare provider may use a 'Mixed Oak' extract for treatment instead of a single-species extract.
> Important: Your healthcare provider will evaluate your complete medical history, including your lung function and current medications, before prescribing Quercus Virginiana Pollen.
Quercus Virginiana Pollen is generally classified as Pregnancy Category C. This means that adequate animal reproduction studies have not been conducted, and its safety in pregnant women has not been established through controlled clinical trials.
There is no evidence to suggest that the pollen proteins in Quercus Virginiana Pollen extract pass into breast milk in any significant amount. Furthermore, even if they did, the proteins would likely be digested in the infant's stomach. Immunotherapy is generally considered safe for breastfeeding mothers. The primary consideration is the mother's health and her ability to manage any potential side effects.
Allergen immunotherapy is widely used and highly effective in the pediatric population. It is particularly beneficial because it may prevent the 'allergic march'—the progression from allergic rhinitis to the development of asthma.
In patients over age 65, the decision to use Quercus Virginiana Pollen must be made with caution.
There are no specific studies on Quercus Virginiana Pollen in patients with kidney disease. However, because the treatment involves small amounts of protein that are naturally degraded by the body, renal impairment is not a contraindication. The main concern would be the patient's ability to tolerate emergency medications if a reaction occurs.
Liver disease does not affect the processing of allergenic extracts. No dosage adjustments are necessary for patients with hepatic impairment.
> Important: Special populations require individualized medical assessment. Always inform your allergist if you are pregnant, planning to become pregnant, or have any chronic health conditions.
Quercus Virginiana Pollen extract works by inducing immunological tolerance. The primary molecular targets are the B-lymphocytes and T-lymphocytes. In an allergic individual, B-cells produce high levels of IgE antibodies in response to oak pollen. These IgE molecules coat the surface of mast cells. Upon re-exposure, the pollen allergens cross-link the IgE, causing the mast cell to release histamine, leukotrienes, and cytokines.
Immunotherapy changes this by:
| Parameter | Value |
|---|---|
| Bioavailability | N/A (Subcutaneous injection) |
| Protein Binding | N/A (Complex protein mixture) |
| Half-life | Minutes to hours (proteins); Years (immunological effect) |
| Tmax | 30-60 minutes (for systemic absorption) |
| Metabolism | Proteolytic degradation in tissues |
| Excretion | Renal (as amino acids/peptides) |
Quercus Virginiana Pollen is classified as an Allergenic Extract. It is specifically a 'Non-Standardized' extract, distinguishing it from standardized extracts where the potency is measured by skin test units in humans. It is related to other tree pollen extracts like White Oak, Pecan, and Hickory.
Common questions about Quercus Virginiana Pollen
Quercus Virginiana Pollen extract is primarily used for the diagnosis and treatment of allergies to the Southern Live Oak tree. In diagnosis, a small amount is applied to the skin to see if it causes a 'wheal and flare' reaction, indicating a sensitivity. In treatment, known as allergen immunotherapy or allergy shots, the extract is injected in increasing amounts over several years. This process helps the immune system build up a tolerance to the pollen, reducing symptoms like sneezing, itchy eyes, and asthma. It is specifically indicated for patients whose symptoms are not well-controlled by standard medications.
The most common side effects are local reactions at the site of the injection, occurring in a large majority of patients. These include redness, itching, and swelling that may look like a large mosquito bite. These reactions usually appear within minutes and fade within a day or two. Some patients may also experience a temporary increase in their typical allergy symptoms, such as sneezing or a stuffy nose, shortly after the injection. While these are common and usually mild, any reaction larger than two inches should be reported to your doctor before your next dose.
There is no direct drug-alcohol interaction, but most allergists recommend caution. Alcohol causes your blood vessels to dilate, which could theoretically speed up the absorption of the pollen extract into your bloodstream and increase the risk of a systemic allergic reaction. It is generally best to avoid alcohol for several hours before and after your allergy injection. Additionally, alcohol can sometimes worsen the symptoms of allergic rhinitis. Always follow the specific lifestyle advice provided by your allergy clinic.
Quercus Virginiana Pollen is generally not started during pregnancy because of the risk of anaphylaxis, which can be dangerous for both the mother and the baby. However, if you are already on a stable 'maintenance' dose of allergy shots and then become pregnant, your doctor may allow you to continue the treatment. The risk of a severe reaction is much lower once you have reached the maintenance phase. You should notify your allergist immediately if you become pregnant so they can review your treatment plan. They will likely keep your dose the same rather than increasing it during your pregnancy.
Allergen immunotherapy is a long-term treatment and does not provide immediate relief like an antihistamine. Most patients begin to notice an improvement in their Southern Live Oak allergy symptoms within 6 to 12 months of starting treatment. The full benefits are typically seen after the patient has reached the maintenance dose and has been on it for a full allergy season. For long-lasting results that continue even after the shots are stopped, a full course of 3 to 5 years of treatment is usually recommended by healthcare providers.
Yes, you can stop taking the injections at any time without experiencing withdrawal symptoms, as it is not an addictive medication. However, if you stop the treatment before completing the recommended 3 to 5-year course, your allergy symptoms are likely to return over time. Immunotherapy works by gradually retraining your immune system, and this process requires consistency to be effective. If you are considering stopping because of side effects or scheduling issues, talk to your allergist first, as they may be able to adjust your dose or schedule.
If you miss a scheduled allergy shot, you should contact your allergist's office to reschedule as soon as possible. Do not attempt to make up for the missed dose yourself. Depending on how long it has been since your last injection, your doctor may need to reduce the dose for your next shot to ensure your safety. If too much time passes between doses, your immune system's sensitivity may increase, making your previous dose potentially unsafe. Regularity is the key to both the safety and the effectiveness of this treatment.
There is no clinical evidence to suggest that Quercus Virginiana Pollen or other allergenic extracts cause weight gain. The extract consists of natural proteins and does not contain hormones or metabolic-altering chemicals. If you experience weight changes while on immunotherapy, it is likely due to other factors such as lifestyle changes or other medications you may be taking, such as oral corticosteroids for asthma. If you have concerns about your weight, you should discuss them with your primary care physician.
Most medications are safe to take with Quercus Virginiana Pollen, but there are important exceptions. Beta-blockers (used for blood pressure or heart conditions) and ACE inhibitors are the biggest concern because they can make an allergic reaction more severe or harder to treat. You should also tell your doctor if you are taking MAO inhibitors or certain antidepressants. While antihistamines won't hurt you, they must be stopped before any skin testing because they can hide the results. Always provide your allergist with a complete list of all medications and supplements you use.
The concept of 'generic' vs 'brand name' is different for allergenic extracts than for pills. Quercus Virginiana Pollen is a biological product produced by several different specialized laboratories (such as ALK, Greer, or HollisterStier). While the extracts from different companies are similar, they are not considered identical 'generics' in the way a generic ibuprofen is. Because they are non-standardized, your allergist will usually try to keep you on an extract from the same manufacturer throughout your treatment to ensure the most consistent results and safety.