Bestmade Natural Products Allium Cepa

Allergy Skin Testing

For diagnostic purposes, a single drop (approximately 0.05 mL) of the non-standardized extract is typically applied to the skin during a prick test. If an intradermal test is required, a much more dilute concentration (often 1:100 or 1:1000) is used.

Immunotherapy

Dosage for immunotherapy is highly individualized. It usually begins with a very low dose (e.g., 0.1 mL of a 1:10,000 dilution) and is gradually increased over several months to a maintenance dose determined by the patient's tolerance.

Onion extracts may be used in children for allergy testing under strict medical supervision. Pediatric dosing for immunotherapy must be carefully calculated based on the child's sensitivity levels rather than weight alone. Safety and efficacy in infants have not been established.

Renal Impairment

No specific dosage adjustments are typically required for renal impairment, as the systemic absorption of allergenic extracts is minimal.

Hepatic Impairment

No dosage adjustments are currently recommended for patients with liver disease.

Elderly Patients

Elderly patients may have reduced skin reactivity, which can affect the interpretation of diagnostic tests. Healthcare providers may need to adjust the concentration used for testing.

Onion extracts are administered only by healthcare professionals in a clinical setting.

• Skin Prick Test: Applied to the forearm or back, followed by a small prick through the drop.
• Subcutaneous Injection: Administered into the fatty tissue of the upper arm.
• Storage: Extracts must be stored in a refrigerator between 2°C and 8°C (36°F to 46°F).

If a scheduled immunotherapy dose is missed, contact your allergist. Depending on the length of the delay, the dose may need to be reduced to ensure safety.

An overdose of Onion extract (too high a concentration or volume) can lead to a systemic allergic reaction or anaphylaxis. Emergency treatment with epinephrine and antihistamines is required immediately.

> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or attempt to use these extracts without medical guidance.

• Local Redness (Erythema): Redness at the site of the skin test or injection, usually resolving within 24 hours.
• Swelling (Wheal): A raised, itchy bump at the application site, which is a normal part of the diagnostic process.
• Itching (Pruritus): Localized itching that typically lasts for 1–2 hours after exposure.

• Delayed Local Reaction: Swelling or hardness at the injection site that appears 6–24 hours after administration.
• Nasal Congestion: Mild sneezing or 'runny nose' following exposure to the extract.
• Fatigue: Some patients report feeling tired for several hours after receiving immunotherapy injections.

• Generalized Hives (Urticaria): Itchy bumps appearing on parts of the body away from the injection site.
• Angioedema: Swelling of the lips, tongue, or around the eyes.
• Wheezing: Mild difficulty breathing or chest tightness.

> Warning: Stop using Onion products and call your doctor or emergency services immediately if you experience any of these:

• Anaphylaxis: A life-threatening systemic reaction characterized by a drop in blood pressure, rapid pulse, and airway constriction.
• Severe Dyspnea: Significant difficulty breathing or gasping for air.
• Hypotension: Feeling faint, dizzy, or losing consciousness.
• Throat Tightness: A feeling that the throat is closing or difficulty swallowing.

There are no known long-term adverse effects associated with the appropriate use of Onion allergenic extracts. Prolonged immunotherapy is generally intended to induce long-term tolerance to the allergen.

According to the FDA (2024), many allergenic extracts carry a boxed warning regarding the risk of severe non-standardized reactions. These extracts can cause severe life-threatening systemic reactions, including anaphylaxis. They must only be administered in facilities equipped to handle such emergencies.

Report any unusual symptoms to your healthcare provider.

Onion allergenic extracts should only be administered by physicians experienced in the diagnosis and treatment of allergic diseases. Patients should be observed for at least 30 minutes following administration to monitor for systemic reactions.

Warning: Risk of Systemic Reactions. Onion extracts can cause severe, life-threatening systemic reactions, including anaphylaxis. Patients with unstable asthma or those taking beta-blockers may be at higher risk. Administration must occur in a medical setting where emergency equipment and personnel are available.

• Anaphylaxis Risk: Patients must be screened for current health status (e.g., asthma flares) before each injection.
• Asthma Status: Patients with uncontrolled or severe asthma are at a significantly higher risk for fatal reactions to allergenic extracts.
• Cardiovascular Disease: Patients with pre-existing heart conditions may be less able to tolerate the physiological stress of a systemic reaction.

• Observation Period: A minimum 30-minute wait in the clinic after each dose.
• Lung Function: Peak flow or spirometry may be checked in asthmatic patients before administration.
• Skin Site Inspection: Evaluation of the injection site for excessive local reactions.

Onion extracts generally do not affect the ability to drive. However, if a patient experiences dizziness or a systemic reaction, they should not operate machinery until cleared by a doctor.

While there is no direct interaction, alcohol consumption can increase blood flow to the skin and potentially accelerate the absorption of the extract, increasing the risk of a reaction. It is often advised to avoid alcohol for several hours after an injection.

If a patient experiences a severe systemic reaction, the healthcare provider will re-evaluate the risks and benefits of continuing the therapy. There is no withdrawal syndrome associated with stopping allergenic extracts.

> Important: Discuss all your medical conditions with your healthcare provider before starting Onion therapy.

• Beta-Blockers: These medications can block the effects of epinephrine, which is the primary treatment for anaphylaxis. Using Onion extract while on beta-blockers can make a systemic reaction much more difficult to treat and potentially fatal.

• ACE Inhibitors: Some studies suggest that patients on ACE inhibitors may be at a higher risk for more severe systemic reactions to allergenic extracts.
• MAO Inhibitors: These may potentiate the effects of sympathomimetic amines used to treat reactions, leading to hypertensive crises.

• Antihistamines: These can suppress the skin's response to Onion extract, leading to false-negative results in diagnostic testing. Patients are typically told to stop antihistamines 3–7 days before testing.
• Tricyclic Antidepressants: May interfere with the treatment of a systemic reaction.

• Raw Onion Consumption: Patients undergoing immunotherapy should discuss their dietary intake of onions with their doctor, as oral ingestion may compound the effects of the extract.

• St. John's Wort: May theoretically affect the metabolism of medications used to treat allergic reactions.
• High-Dose Vitamin C: Since Onion contains Vitamin C, supplemental intake should be monitored to avoid exceeding recommended daily allowances.

Onion extract administration does not typically interfere with standard blood or urine laboratory tests. However, it will directly affect the results of Allergy-specific IgE (ImmunoCAP) blood tests by potentially decreasing IgE levels over long-term therapy.

> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking.

• Severe, Uncontrolled Asthma: Patients with a FEV1 consistently below 70% of predicted are at extreme risk for fatal reactions.
• Previous Severe Systemic Reaction: If a patient has had a life-threatening reaction to Onion extract previously, further use is generally contraindicated.
• Recent Myocardial Infarction: Patients who have had a heart attack within the last 3–6 months should avoid allergenic extracts due to the risk of anaphylaxis-induced cardiac stress.

• Beta-Blocker Therapy: Requires a careful risk-benefit analysis by the allergist.
• Pregnancy: While not strictly contraindicated, starting new immunotherapy during pregnancy is generally avoided due to the risk of anaphylaxis to the fetus.
• Autoimmune Diseases: May potentially be exacerbated by immune system modulation.

Patients allergic to Onion may also show cross-sensitivity to other members of the Alliaceae family, including:

• Garlic (Allium sativum)
• Leeks (Allium porrum)
• Chives (Allium schoenoprasum)

> Important: Your healthcare provider will evaluate your complete medical history before prescribing Onion extract.

Onion allergenic extract is categorized as Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. Immunotherapy should only be continued during pregnancy if the benefits outweigh the risks of a systemic reaction, which could cause fetal hypoxia (lack of oxygen). Starting new immunotherapy during pregnancy is not recommended.

It is not known whether components of Onion extract are excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised. However, since the extract is protein-based and administered in small amounts, the risk to the nursing infant is considered low.

Allergenic extracts are used in children as young as 5 years old. The primary concern in pediatric populations is the child's ability to communicate the early symptoms of a systemic reaction. Dosing must be conservative.

Clinical studies of allergenic extracts did not include sufficient numbers of subjects aged 65 and over to determine if they respond differently than younger subjects. Healthcare providers should consider the higher prevalence of cardiovascular disease and the use of beta-blockers in this population.

No specific studies have been conducted in patients with renal impairment. However, given the nature of the extract and its route of administration, no dosage adjustments are typically necessary.

No dosage adjustments are required for patients with hepatic impairment, as the liver does not play a primary role in the clearance of injected allergenic proteins.

> Important: Special populations require individualized medical assessment.

Onion allergenic extract functions as an immunomodulator. In diagnostic use, it cross-links IgE antibodies on the surface of mast cells and basophils, triggering the release of histamine and other mediators. In therapeutic use (immunotherapy), it induces the production of IgG4 (blocking antibodies), suppresses IgE production over time, and modulates T-cell cytokine profiles (reducing IL-4 and IL-5).

• Onset of Action: Skin prick reactions occur within 15–20 minutes. Immunotherapy effects take 6–12 months to become clinically significant.
• Duration of Effect: Diagnostic reactions fade within 2 hours. Immunotherapy benefits can persist for years after a 3–5 year course of treatment.

| Parameter | Value |

|---|---|

| Bioavailability | Low (Subcutaneous) |

| Protein Binding | N/A (Protein-based extract) |

| Half-life | Hours (Local) / Months (Immune effect) |

| Tmax | 15-30 minutes (Local absorption) |

| Metabolism | Proteolysis by local enzymes |

| Excretion | Lymphatic clearance |

• Molecular Components: Contains Alliin, Quercetin, and various Allium proteins (e.g., All c 3, a lipid transfer protein).
• Solubility: Soluble in aqueous buffers and saline.
• Description: A clear to slightly amber liquid extract derived from fresh or dried Allium cepa.

Onion is classified as a Non-Standardized Food Allergenic Extract. It is part of a larger group of diagnostic and therapeutic biologicals used in clinical immunology.