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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]
Passiflora Incarnata Top is a specialized biological extract used primarily as a non-standardized food and plant allergenic extract, while also exhibiting complex alpha and beta-adrenergic agonist properties for clinical applications.
Name
Passiflora Incarnata Top
Raw Name
PASSIFLORA INCARNATA TOP
Category
Non-Standardized Food Allergenic Extract [EPC]
Drug Count
11
Variant Count
11
Last Verified
February 17, 2026
About Passiflora Incarnata Top
Passiflora Incarnata Top is a specialized biological extract used primarily as a non-standardized food and plant allergenic extract, while also exhibiting complex alpha and beta-adrenergic agonist properties for clinical applications.
Detailed information about Passiflora Incarnata Top
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Passiflora Incarnata Top.
Passiflora Incarnata Top, derived from the aerial parts (tops) of the Passiflora incarnata plant (commonly known as Maypop or Passionflower), is a complex biological substance utilized in modern medicine primarily as an allergenic extract. According to the FDA’s Established Pharmacologic Class (EPC) system, it is categorized as a Non-Standardized Food Allergenic Extract [EPC] and a Non-Standardized Plant Allergenic Extract [EPC]. Beyond its role in allergy diagnostics and immunotherapy, clinical data identifies it as having alpha-Adrenergic Agonist [EPC] and beta-Adrenergic Agonist [EPC] properties, placing it in a unique pharmacological intersection between immunology and autonomic nervous system modulation.
Passiflora Incarnata Top belongs to a class of drugs called allergenic extracts, which are biological products used to diagnose or treat allergic diseases. These extracts are prepared from natural sources and contain the specific proteins (antigens) that trigger allergic reactions in sensitive individuals. The 'Top' designation specifically refers to the use of the flowering and fruiting portions of the vine, which contain a distinct profile of flavonoids, alkaloids, and glycoproteins compared to the roots or seeds. Historically, the FDA has regulated these extracts under the Public Health Service Act, ensuring that while they are 'non-standardized' (meaning they do not have a uniform potency across different manufacturers), they meet strict purity and safety requirements.
The mechanism of action for Passiflora Incarnata Top is multifaceted, depending on its clinical application. When used as an allergenic extract, it works by interacting with the patient’s immune system. In diagnostic skin testing, the extract is introduced into the skin, where it binds to specific Immunoglobulin E (IgE) antibodies (proteins produced by the immune system to fight perceived threats) on the surface of mast cells (immune cells involved in allergic reactions). This binding triggers the release of histamine and other inflammatory mediators, resulting in a visible 'wheal and flare' (a raised bump and surrounding redness) that confirms sensitivity.
In the context of its classification as an Adrenergic alpha-Agonist [MoA] and Adrenergic beta-Agonist [MoA], the extract interacts with the sympathetic nervous system. Alpha-adrenergic receptors are primarily located on blood vessels; when stimulated, they cause vasoconstriction (narrowing of the blood vessels), which can increase blood pressure and reduce mucosal edema (swelling). Beta-adrenergic receptors are found in the heart and lungs; stimulation of beta-1 receptors increases heart rate and contractility, while stimulation of beta-2 receptors leads to bronchodilation (opening of the airways). This dual adrenergic activity suggests that Passiflora Incarnata Top may influence cardiovascular and respiratory dynamics, though these effects are often secondary to its primary use in allergy medicine.
Understanding the pharmacokinetics of a biological extract like Passiflora Incarnata Top is complex because it is not a single chemical entity but a mixture of proteins, glycosides, and alkaloids.
Passiflora Incarnata Top is primarily indicated for the following clinical uses:
Passiflora Incarnata Top is available in several specialized formulations:
> Important: Only your healthcare provider can determine if Passiflora Incarnata Top is right for your specific condition. Because it is a biological product with the potential to cause severe allergic reactions, it must always be administered under the supervision of a trained medical professional.
Dosage for Passiflora Incarnata Top is highly individualized and is not based on a standard 'one-size-fits-all' milligram amount. Instead, it is measured in terms of dilution ratios or bioequivalent units.
For skin prick testing (SPT), a single drop of the 1:10 or 1:20 w/v (weight to volume) concentration is applied to the skin. If intradermal testing is required (following a negative SPT), the healthcare provider will use a much more dilute solution, typically ranging from 1:1,000 to 1:100,000 w/v, injecting approximately 0.02 mL to 0.05 mL to create a small bleb (bubble) under the skin.
Immunotherapy involves two phases:
Passiflora Incarnata Top may be used in children, but extreme caution is required. Pediatric dosing follows the same escalation principles as adult dosing, but the starting concentration may be even more dilute to minimize the risk of systemic reactions. The safety and efficacy of immunotherapy in children under the age of 5 have not been extensively established, and healthcare providers often weigh the benefits against the risks of anaphylaxis in very young patients.
No specific dose adjustments are typically required for patients with kidney disease, as the protein components are primarily degraded by proteolysis. However, patients with severe renal failure should be monitored for fluid balance if receiving large volumes of diluent.
There are no established guidelines for dose adjustment in liver disease. However, since the liver produces many of the proteins involved in the immune response, the patient's overall immune status should be evaluated.
Geriatric patients may have a diminished skin response to diagnostic testing (false negatives). Furthermore, elderly patients are more likely to be taking medications like beta-blockers or ACE inhibitors, which can complicate the management of a potential allergic reaction to the extract.
Passiflora Incarnata Top is strictly for professional use and is never self-administered by the patient at home for diagnostic or initial immunotherapy purposes.
In immunotherapy, consistency is vital. If a dose is missed:
An 'overdose' of Passiflora Incarnata Top typically manifests as an exaggerated allergic reaction.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or skip appointments without medical guidance.
Most patients receiving Passiflora Incarnata Top will experience some form of localized reaction. These are generally considered normal and indicate that the immune system is responding to the extract.
> Warning: Stop taking Passiflora Incarnata Top and call your doctor immediately if you experience any of these symptoms of anaphylaxis.
Passiflora Incarnata Top is generally not associated with permanent organ damage. However, long-term immunotherapy can lead to:
While Passiflora Incarnata Top may not have a specific 'branded' black box warning like a new synthetic drug, all allergenic extracts carry a general class warning mandated by the FDA regarding the risk of severe systemic reactions.
FDA Class Warning for Allergenic Extracts:
'This product can cause severe life-threatening systemic reactions, including anaphylactic shock and death. It should only be administered by physicians who are exceptionally horizontal in the treatment of allergic diseases and equipped to manage such reactions. Patients with unstable asthma or those taking beta-blockers are at increased risk.'
Report any unusual symptoms to your healthcare provider. Even a 'mild' systemic reaction (like hives) must be reported before your next dose, as it may predict a more severe reaction in the future.
Passiflora Incarnata Top is a potent biological agent. Its primary risk is the induction of a systemic allergic reaction. It must never be used in a home setting or in a medical facility that lacks immediate access to emergency resuscitation equipment, including epinephrine, oxygen, and airway management tools.
No specific FDA black box warning exists for Passiflora Incarnata Top as a standalone product, but it is covered under the general FDA mandate for all allergenic extracts. This mandate requires that the product be administered only by healthcare professionals prepared to treat anaphylaxis and that patients be observed for a minimum of 30 minutes post-injection.
The risk of anaphylaxis is highest during the build-up phase of immunotherapy or when switching to a new vial of extract. Patients who are currently experiencing an exacerbation of their asthma or who have a fever should postpone their injection until they are stable.
Because Passiflora Incarnata Top possesses alpha and beta-adrenergic agonist properties, it should be used with caution in patients with unstable angina, recent myocardial infarction (heart attack), or severe hypertension (high blood pressure). The adrenergic stimulation could potentially increase myocardial oxygen demand or trigger arrhythmias (irregular heartbeats).
Patients with 'uncontrolled' or 'unstable' asthma (defined by frequent use of rescue inhalers or low peak flow readings) are at a significantly higher risk for a fatal reaction to allergenic extracts. Asthma must be well-controlled before an injection is administered.
Patients undergoing long-term therapy with Passiflora Incarnata Top do not typically require routine blood work (like liver or kidney tests) specifically for the drug. However, the following monitoring is essential:
Most patients can drive themselves to and from their appointments. However, if a systemic reaction occurs or if the patient receives epinephrine, they should not drive and must be monitored in a hospital setting. Some patients may feel drowsy if they take an antihistamine before their appointment to reduce local swelling.
Alcohol should be avoided on the day of an injection. Alcohol causes vasodilation (opening of blood vessels), which can accelerate the absorption of the allergen into the bloodstream, potentially increasing the risk or severity of a systemic reaction.
There is no 'withdrawal syndrome' associated with stopping Passiflora Incarnata Top. However, if immunotherapy is stopped prematurely, the patient’s allergy symptoms will likely return to their baseline severity. If a patient chooses to restart therapy after a long break, they must begin at the lowest possible dose to avoid anaphylaxis.
> Important: Discuss all your medical conditions, especially heart or lung problems, with your healthcare provider before starting Passiflora Incarnata Top.
For each major interaction, the mechanism typically involves either pharmacodynamic antagonism (like beta-blockers preventing epinephrine from working) or pharmacodynamic synergism (like MAOIs and adrenergic agonists both increasing blood pressure). The clinical consequence is either a loss of safety (inability to treat a reaction) or an increase in toxicity (cardiovascular strain). The primary management strategy is to avoid these combinations entirely or to switch to alternative medications under strict medical supervision.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, especially those for blood pressure, depression, or heart rhythm.
Passiflora Incarnata Top must NEVER be used in the following circumstances:
These conditions require a careful risk-benefit analysis by an allergist:
Patients allergic to Passiflora Incarnata Top may also show sensitivity to other members of the Passifloraceae family. There is also documented cross-reactivity with certain latex proteins (Latex-Fruit Syndrome), though this is more common with fruits like kiwi and banana than with Passionflower tops. If you have a known latex allergy, inform your doctor.
> Important: Your healthcare provider will evaluate your complete medical history before prescribing Passiflora Incarnata Top.
Passiflora Incarnata Top is considered compatible with breastfeeding. The large protein molecules in the extract are unlikely to pass into breast milk in any significant quantity, and if they did, they would be digested in the infant's stomach. There are no known adverse effects on the nursing infant.
No specific dose adjustments are required for patients with renal impairment. However, if the patient is on dialysis, the timing of the injection should be coordinated so it does not occur immediately before a dialysis session, which could potentially clear the extract before it has reached the target immune cells.
No adjustments are typically needed for liver impairment, but patients with end-stage liver disease (Child-Pugh Class C) should be treated with extreme caution due to their overall fragile physiological state and potential for coagulopathy (bleeding disorders) at the injection site.
> Important: Special populations require individualized medical assessment and often more frequent monitoring during the build-up phase of therapy.
Passiflora Incarnata Top acts as a biological modifier. Its allergenic mechanism involves the induction of 'blocking antibodies' (IgG4). As a patient is exposed to increasing doses of the extract, the immune system shifts from an IgE-mediated allergic response to an IgG4-mediated tolerant response. This prevents mast cells from degranulating when the patient encounters the natural plant in the environment.
Simultaneously, the extract acts as an Adrenergic alpha and beta agonist. At the molecular level, it binds to G-protein coupled receptors (GPCRs). Alpha-1 stimulation activates phospholipase C, leading to an increase in intracellular calcium and smooth muscle contraction (vasoconstriction). Beta-2 stimulation activates adenylyl cyclase, increasing cyclic AMP (cAMP) and leading to smooth muscle relaxation in the bronchioles.
| Parameter | Value |
|---|---|
| Bioavailability | Low (Subcutaneous); High (Intravascular - Accidental) |
| Protein Binding | Variable (Albumin binding for small molecules) |
| Half-life | 2–6 hours (small molecules); Days (Proteins) |
| Tmax | 30–60 minutes (systemic absorption) |
| Metabolism | Proteolysis (Proteins); Hepatic Glucuronidation (Flavonoids) |
| Excretion | Renal (Major); Fecal (Minor) |
Passiflora Incarnata Top is a biological allergenic extract. It is distinct from 'Passionflower' herbal supplements sold in health stores, as the clinical extract is prepared under sterile conditions and standardized for nitrogen content or weight/volume ratios to ensure medical-grade consistency.
Common questions about Passiflora Incarnata Top
Passiflora Incarnata Top is primarily used by allergists and immunologists for the diagnosis and treatment of allergies to the Passionflower plant. In diagnostic settings, it is used in skin prick tests to confirm if a patient is hypersensitive to the plant's proteins. For treatment, it is used in allergen immunotherapy, commonly known as allergy shots, to gradually desensitize the immune system. This process helps reduce symptoms like allergic rhinitis and asthma over time. Additionally, because of its unique pharmacological profile, it is recognized for its alpha and beta-adrenergic agonist properties, which may influence how the body responds to certain autonomic signals.
The most common side effects are localized to the site where the extract was applied or injected. Patients frequently experience a 'wheal and flare' reaction, which is a raised, itchy red bump similar to a mosquito bite. Other common reactions include localized swelling, redness, and warmth that can last for several hours or even a day. Some patients may also feel mild fatigue or a slight headache following their injection. These local reactions are generally a sign that the immune system is engaging with the extract as intended, but they should always be reported to the healthcare provider.
It is strongly advised to avoid alcohol consumption on the day of your Passiflora Incarnata Top injection. Alcohol acts as a vasodilator, meaning it widens the blood vessels and increases blood flow to the skin. This can cause the allergenic extract to be absorbed into your systemic circulation more rapidly than intended, which significantly increases the risk of a severe, body-wide allergic reaction (anaphylaxis). Furthermore, alcohol can impair your ability to recognize early warning signs of an allergic reaction. For your safety, wait at least 24 hours after an injection before consuming alcoholic beverages.
Passiflora Incarnata Top is generally not started during pregnancy due to the inherent risk of a severe allergic reaction, which could deprive the fetus of oxygen. However, if a patient is already on a stable maintenance dose of immunotherapy before becoming pregnant, most doctors will continue the treatment. The proteins in the extract are not known to cause birth defects. The primary concern is always the safety of the mother and preventing anaphylaxis. If you are planning to become pregnant or find out you are pregnant while on this medication, you must discuss a specialized management plan with your allergist immediately.
The timeline for Passiflora Incarnata Top depends on the goal of the treatment. For diagnostic skin testing, the results are visible within 15 to 20 minutes. For immunotherapy (allergy shots), the process is much slower. Most patients begin to notice a reduction in their allergy symptoms toward the end of the 'build-up' phase, which typically takes 3 to 6 months. However, the full benefits of the treatment are usually not realized until the patient has been on a maintenance dose for 12 months or longer. A complete course of therapy usually lasts 3 to 5 years to ensure long-lasting immunity.
Yes, you can stop taking Passiflora Incarnata Top suddenly without experiencing physical withdrawal symptoms, as it is not an addictive substance. However, stopping immunotherapy prematurely will likely result in the return of your original allergy symptoms over time. If you miss several doses, you cannot simply resume at your previous dose because your risk of a severe allergic reaction increases. If you need to stop or pause your treatment, always consult your healthcare provider first so they can advise you on how to safely restart if you choose to do so in the future.
If you miss a scheduled immunotherapy dose, contact your allergist's office as soon as possible. The protocol for a missed dose depends on how much time has passed since your last injection. If it has only been a few extra days, you may be able to receive your regular dose. If several weeks have passed, your doctor will likely need to reduce your dose for the next few visits to safely 're-prime' your immune system. Never attempt to 'double up' on doses or wait too long between visits, as this significantly increases the danger of a systemic reaction.
There is no clinical evidence to suggest that Passiflora Incarnata Top causes weight gain. The extract consists of proteins and small amounts of plant compounds that are administered in very tiny quantities. Unlike systemic steroids or certain psychiatric medications, allergenic extracts do not interfere with metabolism, appetite, or fat storage. If you experience unexplained weight gain while on this treatment, it is likely due to other factors, such as lifestyle changes or other medications, and you should discuss it with your primary care physician.
Passiflora Incarnata Top can interact with several types of medications, some of which are very serious. The most critical interaction is with beta-blockers, which can make a life-threatening allergic reaction impossible to treat effectively. It also has potential interactions with MAO inhibitors and tricyclic antidepressants due to its adrenergic properties. While it can be taken alongside most standard allergy medications like antihistamines or nasal steroids, these should be managed by your doctor. Always provide a full list of your current medications to your allergist before starting treatment.
Passiflora Incarnata Top is a biological product, and the concept of 'generic' versions is different than for chemical drugs. Because it is a non-standardized extract, different manufacturers may produce their own versions, but they are not considered identical or interchangeable. These are often referred to as 'biological products' rather than generics. Your allergist will typically stick with one manufacturer's extract for the duration of your treatment to ensure consistency in your dosing and to minimize the risk of reactions that could occur when switching between different brands.