Loading...
Loading...
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Food Allergenic Extract [EPC]
Scleranthus Annuus Flowering Top is a non-standardized allergenic extract used primarily in the diagnosis and treatment of specific plant-based allergies. It belongs to the class of Non-Standardized Plant Allergenic Extracts.
Name
Scleranthus Annuus Flowering Top
Raw Name
SCLERANTHUS ANNUUS FLOWERING TOP
Category
Non-Standardized Food Allergenic Extract [EPC]
Drug Count
7
Variant Count
7
Last Verified
February 17, 2026
About Scleranthus Annuus Flowering Top
Scleranthus Annuus Flowering Top is a non-standardized allergenic extract used primarily in the diagnosis and treatment of specific plant-based allergies. It belongs to the class of Non-Standardized Plant Allergenic Extracts.
Detailed information about Scleranthus Annuus Flowering Top
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Scleranthus Annuus Flowering Top.
Scleranthus Annuus Flowering Top, commonly known as Annual Knawel, is a botanical substance utilized in the field of immunology and allergy medicine. Within a clinical context, it is categorized as a Non-Standardized Plant Allergenic Extract [EPC]. Unlike standardized extracts, which have a potency measured in Bioequivalent Allergy Units (BAU) or Allergy Units (AU), non-standardized extracts like Scleranthus Annuus are prepared using traditional weight-to-volume (w/v) ratios or protein nitrogen unit (PNU) measurements. This extract is derived from the flowering tops of the Scleranthus annuus plant, a member of the Caryophyllaceae family.
Historically, the use of allergenic extracts was grandfathered into FDA regulation under the Biologics Act of 1902 and later the Public Health Service Act of 1944. Scleranthus Annuus Flowering Top is primarily indicated for use in skin testing (diagnostic) and as part of subcutaneous immunotherapy (SIT), often referred to as 'allergy shots.' It is intended for patients who demonstrate a clinical history of hypersensitivity to this specific weed pollen and who have failed to achieve adequate symptom control through environmental avoidance or pharmacotherapy (such as antihistamines and nasal corticosteroids).
The mechanism of action for Scleranthus Annuus Flowering Top depends on its clinical application. When used for diagnostic skin testing, the extract is introduced into the epidermis (prick/puncture test) or dermis (intradermal test). If the patient is sensitized, specific Immunoglobulin E (IgE) antibodies bound to the surface of mast cells in the skin will recognize the Scleranthus allergens. This recognition triggers mast cell degranulation, releasing inflammatory mediators such as histamine, leukotrienes, and prostaglandins. The result is a 'wheal and flare' reaction—a raised bump surrounded by redness—which confirms the patient's sensitivity to the allergen.
When used for immunotherapy, the mechanism is more complex and involves 'desensitization.' By administering gradually increasing doses of the Scleranthus extract, the healthcare provider aims to shift the patient's immune response from a Th2-dominated profile (which promotes IgE production and allergic inflammation) to a Th1-dominated or T-regulatory (Treg) profile. This shift leads to the production of 'blocking antibodies,' specifically IgG4, which compete with IgE for allergen binding. Over time, this reduces the recruitment of eosinophils and basophils to the respiratory mucosa, effectively raising the patient's threshold for allergic symptoms upon natural exposure to Scleranthus pollen.
As a biologic allergenic extract consisting of complex proteins and polysaccharides, Scleranthus Annuus Flowering Top does not follow the traditional pharmacokinetic pathways (absorption, distribution, metabolism, and excretion) of small-molecule drugs.
Scleranthus Annuus Flowering Top is FDA-approved for the following indications:
This extract is typically available in the following formats:
> Important: Only your healthcare provider can determine if Scleranthus Annuus Flowering Top is right for your specific condition. The administration must always be performed by a trained medical professional prepared to treat anaphylaxis.
Dosage for Scleranthus Annuus Flowering Top is highly individualized and must be determined by an allergist based on the patient's sensitivity levels.
Immunotherapy follows a two-phase schedule:
Scleranthus Annuus Flowering Top is used in children, but the dosage must be approached with extreme caution. Children are generally started on the same weight-to-volume dilutions as adults, but the volume of the injection may be adjusted based on the child's size and the severity of their allergic history. There is no specific age cutoff, but immunotherapy is rarely started in children under the age of 5 due to the difficulty of monitoring for early signs of systemic reactions.
No specific dosage adjustments are typically required for patients with renal impairment, as the protein components are primarily degraded by proteolysis. However, the patient's overall health must be stable before administration.
No specific adjustments are required for hepatic impairment. The liver does not play a primary role in the clearance of allergenic extracts.
Elderly patients (over 65) should be evaluated for cardiovascular stability. If an elderly patient is taking beta-blockers for hypertension or heart disease, immunotherapy may be contraindicated due to the risk of refractory anaphylaxis.
This medication is never self-administered by the patient at home. It must be administered in a clinical setting by a healthcare professional.
If a dose is missed during the build-up phase, the next dose may need to be reduced or the previous dose repeated to ensure safety. If several weeks are missed during the maintenance phase, the allergist will typically restart the build-up from a safer, lower concentration. Do not attempt to 'catch up' by taking a higher dose.
An 'overdose' in the context of allergenic extracts refers to the administration of a dose that exceeds the patient's current tolerance level. This can lead to a severe systemic reaction.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance.
Local reactions are the most frequent side effect associated with Scleranthus Annuus Flowering Top injections. These occur in nearly all patients at some point during therapy.
These reactions are more generalized but not necessarily life-threatening:
> Warning: Stop taking Scleranthus Annuus Flowering Top and call your doctor immediately if you experience any of these symptoms of anaphylaxis.
There are no known long-term 'toxic' effects of Scleranthus Annuus Flowering Top, as it is a natural protein extract. However, prolonged use in patients with poorly controlled asthma may lead to a gradual worsening of bronchial hyperreactivity if systemic reactions occur frequently. The primary long-term risk is the development of new sensitivities, though this is rare and generally the goal of immunotherapy is the opposite (desensitization).
Allergenic extracts, including Scleranthus Annuus Flowering Top, can cause severe life-threatening systemic reactions, including anaphylaxis.
Report any unusual symptoms to your healthcare provider.
Scleranthus Annuus Flowering Top must only be used by physicians who are experienced in the diagnosis and treatment of allergic diseases. Because of the risk of systemic reactions, the patient's current health status must be assessed before every injection. If a patient is currently experiencing an asthma flare or has a significant infection (such as a fever or flu), the injection should be postponed.
No FDA black box warnings are uniquely assigned to Scleranthus Annuus specifically beyond the general class warning for all allergenic extracts. The standardized class warning emphasizes that anaphylaxis is a constant risk and that the extract is not interchangeable with other extracts of different manufacturers or different potencies without careful clinical adjustment.
Most patients can drive after the 30-minute observation period. However, if a patient experiences significant fatigue or a mild systemic reaction (requiring antihistamines), they should avoid driving or operating heavy machinery until they feel fully recovered.
While there is no direct chemical interaction between alcohol and Scleranthus Annuus extract, alcohol consumption can cause vasodilation (widening of blood vessels). This may theoretically increase the rate of allergen absorption or mask the early signs of a systemic reaction. It is generally advised to avoid alcohol for several hours after an injection.
Immunotherapy is typically discontinued if:
> Important: Discuss all your medical conditions with your healthcare provider before starting Scleranthus Annuus Flowering Top.
There are no known specific food interactions with Scleranthus Annuus Flowering Top. However, patients should avoid eating a heavy meal or consuming very hot beverages immediately before or after an injection, as this can increase peripheral blood flow and potentially speed up allergen absorption.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking.
Scleranthus Annuus Flowering Top must NEVER be used in the following circumstances:
In these cases, the healthcare provider will perform a careful risk-benefit analysis:
Patients allergic to Scleranthus annuus (Annual Knawel) may show cross-reactivity with other members of the Caryophyllaceae family, such as Stellaria media (Chickweed) or Dianthus species (Carnations). While not always clinically significant, the allergist will consider these potential cross-reactions when designing a treatment plan.
> Important: Your healthcare provider will evaluate your complete medical history before prescribing Scleranthus Annuus Flowering Top.
Scleranthus Annuus Flowering Top is classified as FDA Pregnancy Category C. This means that animal reproduction studies have not been conducted, and it is unknown whether the extract can cause fetal harm.
It is not known whether allergenic proteins from Scleranthus Annuus are excreted in human milk. However, because these are large proteins that are degraded in the mother's system, it is highly unlikely that they would reach the infant in any significant or active form. Breastfeeding is generally considered safe during immunotherapy.
Immunotherapy with Scleranthus Annuus is effective in children for reducing symptoms of allergic rhinitis and potentially preventing the 'allergic march' toward asthma.
Patients over the age of 65 require a thorough cardiovascular evaluation before starting Scleranthus Annuus extract.
No dosage adjustments are required. However, patients with end-stage renal disease (ESRD) on dialysis should be monitored closely, as their overall inflammatory state and medication profile may be complex.
There are no specific restrictions for patients with liver disease. The metabolism of allergenic extracts is not dependent on hepatic CYP450 enzymes.
> Important: Special populations require individualized medical assessment.
Scleranthus Annuus Flowering Top functions as an immunomodulator. In the diagnostic phase, it acts as an antigen that cross-links IgE molecules on the surface of mast cells. In the therapeutic phase (immunotherapy), it induces a state of 'immunological tolerance.' This is achieved by:
The pharmacodynamic effect is delayed. While a skin test reaction is visible in 20 minutes, the therapeutic effects of immunotherapy typically take 3 to 6 months to become noticeable and 12 to 18 months to reach peak efficacy. The duration of the effect can last for several years after the completion of a 3-to-5-year treatment course.
| Parameter | Value |
|---|---|
| Bioavailability | N/A (Subcutaneous Injection) |
| Protein Binding | N/A (Degraded by proteases) |
| Onset of Action (Testing) | 15–20 minutes |
| Onset of Action (Therapy) | 3–6 months |
| Metabolism | Local and systemic proteolysis |
| Excretion | Renal (as amino acids/peptides) |
Scleranthus Annuus Flowering Top extract is a sterile liquid containing the water-soluble fraction of the pollen and flowering parts of the plant.
It belongs to the Non-Standardized Plant Allergenic Extract class. Other drugs in this class include extracts for Ragweed, Oak, and various grasses. It is distinct from 'Standardized' extracts like Timothy Grass or Short Ragweed, which have federally mandated potency requirements.
Medications containing this ingredient
Common questions about Scleranthus Annuus Flowering Top
Scleranthus Annuus Flowering Top is primarily used for the diagnosis and treatment of allergies to the Annual Knawel plant. In a clinical setting, an allergist uses a diluted form of the extract to perform skin prick tests, which determine if a patient has specific IgE antibodies against this weed. If a sensitivity is confirmed and the patient has significant symptoms, the extract is then used in immunotherapy, also known as allergy shots. This process involves giving gradually increasing doses of the allergen to help the immune system build a tolerance. Over time, this can significantly reduce symptoms of hay fever and allergic asthma caused by this specific pollen.
The most common side effects are localized reactions at the site of the injection or skin test. These typically include redness, itching, and a raised bump or swelling (wheal) that appears shortly after the extract is administered. Some patients may also experience a 'large local reaction,' where the swelling spreads several inches across the arm. Systemic side effects, though less common, can include sneezing, nasal congestion, or feeling unusually tired after a treatment session. Because it is an allergen, there is always a small risk of a severe reaction, so patients are monitored closely by medical staff after every dose.
It is generally recommended to avoid alcohol for at least several hours before and after receiving an injection of Scleranthus Annuus Flowering Top. Alcohol causes vasodilation, which is the widening of blood vessels, and this can potentially increase the speed at which the allergen is absorbed into your bloodstream. Faster absorption increases the risk of a systemic allergic reaction or anaphylaxis. Furthermore, alcohol can mask early warning signs of an allergic reaction, such as flushing or dizziness, making it harder for you or your doctor to identify a problem. Always follow the specific safety protocols provided by your allergy clinic regarding lifestyle choices on injection days.
Scleranthus Annuus Flowering Top is classified as Pregnancy Category C, meaning its safety has not been fully established through controlled human studies. Most allergists will not start a new course of immunotherapy during pregnancy because of the risk of anaphylaxis, which could deprive the developing fetus of oxygen. However, if a woman is already on a stable maintenance dose and is tolerating the injections well, many doctors will continue the treatment throughout pregnancy. This prevents the mother's allergy symptoms from worsening, which could otherwise require more aggressive medication. If you are pregnant or planning to become pregnant, you must discuss the risks and benefits of continuing allergy shots with your healthcare provider.
The timeline for Scleranthus Annuus Flowering Top to provide relief depends on whether it is being used for testing or treatment. For diagnostic skin testing, the results are visible almost immediately, typically within 15 to 20 minutes. For immunotherapy (allergy shots), the process is much slower and requires a 'build-up' phase that usually lasts 3 to 6 months. Most patients begin to notice a decrease in their allergy symptoms toward the end of this build-up phase or shortly after reaching their maintenance dose. Maximum benefit is usually achieved after 12 to 18 months of consistent treatment, and therapy is typically continued for 3 to 5 years for long-lasting results.
Yes, you can stop taking Scleranthus Annuus Flowering Top injections suddenly without experiencing 'withdrawal' symptoms like you might with certain other medications. However, stopping immunotherapy prematurely will likely result in the return of your original allergy symptoms, as your immune system will not have had enough time to develop a permanent tolerance to the pollen. If you miss several doses, you cannot simply resume at your previous dose level because your risk of a severe reaction increases. You should always consult your allergist before stopping or if you have missed appointments, as they will need to adjust your dosing schedule to ensure your safety.
If you miss a scheduled immunotherapy dose of Scleranthus Annuus Flowering Top, you should contact your allergist's office as soon as possible to reschedule. Do not attempt to double the next dose or take it more frequently to make up for the missed one. Depending on how many weeks have passed since your last injection, your doctor may need to repeat your last dose or even reduce the dose slightly to ensure your safety. Maintaining a consistent schedule is critical for both the effectiveness of the treatment and the prevention of serious allergic reactions. Your clinic will have a specific protocol for 'late' injections based on which phase of treatment you are in.
There is no clinical evidence to suggest that Scleranthus Annuus Flowering Top causes weight gain. The extract consists of natural proteins and pollens that are administered in very small quantities subcutaneously. Unlike systemic corticosteroids (like prednisone), which are known to cause weight gain and metabolic changes, allergenic extracts do not affect your metabolism, appetite, or fat distribution. If you experience weight changes while undergoing immunotherapy, it is likely due to other factors, such as lifestyle changes or other medications you may be taking for your allergies. Always discuss any unexpected physical changes with your healthcare provider.
Scleranthus Annuus Flowering Top can be taken alongside many common medications, but there are some critical exceptions. You must inform your doctor if you are taking beta-blockers, ACE inhibitors, or MAO inhibitors, as these can make allergic reactions more dangerous or harder to treat. While you can continue taking most daily allergy medications like antihistamines during immunotherapy, you must stop taking them several days before any diagnostic skin testing, as they will block the reaction and lead to inaccurate results. Always provide your allergist with a complete and updated list of all prescription drugs, over-the-counter medicines, and herbal supplements you are currently using.
The concept of 'generic' drugs does not apply to allergenic extracts in the same way it does to synthetic pills. Scleranthus Annuus Flowering Top is a biological product, and various manufacturers may produce their own versions of the extract. However, because these are 'non-standardized' extracts, the products from different companies are not considered identical or interchangeable. Each manufacturer uses its own proprietary methods for extraction and concentration. If your doctor switches you from one manufacturer's extract to another, they will typically restart your dosing or reduce it significantly to ensure that the new product does not cause an unexpected allergic reaction.