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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Lolium Perenne
Brand Name
Standardized Perennial Rye Grass
Generic Name
Lolium Perenne
Active Ingredient
Lolium Perenne PollenCategory
Standardized Pollen Allergenic Extract [EPC]
Variants
1
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 100000 [BAU]/mL | INJECTION | CUTANEOUS, INTRADERMAL, SUBCUTANEOUS | 49643-379 |
Detailed information about Standardized Perennial Rye Grass
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Standardized Perennial Rye Grass, you must consult a qualified healthcare professional.
Lolium Perenne Pollen is a standardized allergenic extract used in immunotherapy to treat allergic rhinitis and conjunctivitis by desensitizing the immune system to perennial ryegrass allergens.
Dosage for Lolium Perenne Pollen is highly individualized and must be managed by an allergist or immunologist. The treatment is divided into two distinct phases:
Lolium Perenne Pollen is approved for use in children, typically starting at age 5. The dosing schedule is similar to that of adults but requires even more vigilant monitoring for adverse reactions. Healthcare providers often use a more conservative build-up schedule for younger children. It is not generally recommended for children under 5 years of age due to the difficulty they may have in communicating early symptoms of a systemic reaction.
No specific dosage adjustments are required for patients with renal impairment, as the allergens are not cleared by the kidneys in a manner that affects systemic toxicity.
No dosage adjustments are necessary for patients with liver disease.
Caution is advised in elderly patients, particularly those with underlying cardiovascular disease. The risk-benefit ratio must be carefully weighed, as older adults may be less resilient to the effects of a systemic allergic reaction or the epinephrine required to treat it.
For subcutaneous immunotherapy (SCIT):
For sublingual immunotherapy (SLIT):
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:
Never double the dose to catch up.
An overdose of Lolium Perenne Pollen (receiving too much allergen) can lead to a severe systemic allergic reaction or anaphylaxis. Symptoms include generalized hives, swelling of the throat, wheezing, low blood pressure, and loss of consciousness. Emergency treatment with epinephrine is required immediately. If you suspect an error in dosing, alert your medical provider instantly.
> Important: Follow your healthcare provider's dosing instructions exactly. Do not adjust your dose or frequency without medical guidance, as this significantly increases the risk of a life-threatening reaction.
Most patients receiving Lolium Perenne Pollen immunotherapy will experience some form of local reaction. These are generally considered part of the therapeutic process but should be monitored.
> Warning: Stop taking Lolium Perenne Pollen and call your doctor or emergency services immediately if you experience any of these symptoms of anaphylaxis:
There are no known long-term 'toxic' effects of Lolium Perenne Pollen on the organs (such as the liver or kidneys). The primary long-term effect is the desired modulation of the immune system. However, in rare cases, patients may develop 'eosinophilic esophagitis' (inflammation of the esophagus) with long-term sublingual use, characterized by difficulty swallowing or persistent heartburn.
Standardized Lolium Perenne Pollen extracts, particularly sublingual tablets, often carry an FDA Black Box Warning regarding the risk of severe allergic reactions.
Summary of Warning: Lolium Perenne Pollen can cause life-threatening allergic reactions such as anaphylaxis. Patients must be prescribed an epinephrine auto-injector and be trained in its use. The treatment is contraindicated in patients with severe, unstable, or uncontrolled asthma. The first dose must be administered under medical supervision, and patients must be observed for at least 30 minutes.
Report any unusual symptoms, especially those occurring within the first hour of treatment, to your healthcare provider immediately.
Lolium Perenne Pollen is a biological product that carries a risk of systemic allergic reactions. It should only be prescribed by physicians who are experienced in the treatment of allergic diseases and the management of anaphylaxis. Patients must be in good health at the time of each administration; if you have a fever, respiratory infection, or an asthma flare-up, your dose may need to be postponed.
No FDA black box warnings exist for the non-standardized injectable forms, but the standardized sublingual tablets (e.g., those containing Ryegrass as part of a mix) do carry a black box warning. It states that the product can cause life-threatening anaphylaxis and should not be used in patients with severe or unstable asthma. It also mandates that patients have access to an auto-injectable epinephrine device at all times during therapy.
Lolium Perenne Pollen generally does not cause sedation. However, if you experience a systemic reaction or feel lightheaded after a dose, you should not drive or operate heavy machinery until you have fully recovered and been cleared by a medical professional.
There is no direct chemical interaction between alcohol and Lolium Perenne Pollen. However, alcohol can cause vasodilation (widening of blood vessels), which may theoretically increase the rate of allergen absorption or mask the early symptoms of an allergic reaction. It is best to avoid alcohol for several hours after a dose.
Immunotherapy is typically a 3-to-5-year commitment. Stopping early may result in the return of allergy symptoms. There is no 'withdrawal syndrome' associated with stopping Lolium Perenne Pollen, but the clinical benefits will gradually diminish over time if the course is not completed.
> Important: Discuss all your medical conditions, especially asthma and heart problems, with your healthcare provider before starting Lolium Perenne Pollen.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, especially those for blood pressure or heart rhythm.
Lolium Perenne Pollen must NEVER be used in the following circumstances:
Patients allergic to Lolium Perenne often show cross-reactivity to other members of the Poaceae family, including:
If you have had a severe reaction to any 'Northern Grass' extract, you must inform your allergist before beginning Lolium Perenne treatment.
> Important: Your healthcare provider will evaluate your complete medical history, including your respiratory status and current medications, before prescribing Lolium Perenne Pollen.
Lolium Perenne Pollen is generally classified as Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. The primary concern is not the pollen itself, which does not cross the placenta in significant amounts, but the potential for a systemic reaction (anaphylaxis) in the mother. Anaphylaxis can cause a sudden drop in maternal blood pressure, leading to decreased uterine blood flow and fetal distress. Most allergists recommend continuing maintenance doses during pregnancy if they are well-tolerated, but they strongly advise against starting or escalating doses during pregnancy.
It is not known whether Lolium Perenne Pollen allergens or the resulting antibodies are excreted in human milk. However, since these are large proteins and the treatment is immunological rather than systemic-chemical, the risk to the nursing infant is considered very low. Breastfeeding is generally considered safe during immunotherapy, but you should discuss the timing of your doses with your doctor.
Lolium Perenne Pollen is approved for pediatric use, typically in children 5 years of age and older. Clinical trials have shown that immunotherapy is effective in children and may even prevent the 'allergic march' (the progression from hay fever to asthma). However, children must be able to follow instructions and report early symptoms of a reaction. Dosing is the same as for adults, but the observation period after injections is even more critical.
Clinical studies of Lolium Perenne Pollen often do not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently than younger subjects. In general, dose selection for an elderly patient should be cautious, reflecting the greater frequency of concomitant cardiovascular disease and the use of medications like beta-blockers or ACE inhibitors that complicate the management of allergic reactions.
There are no specific guidelines for Lolium Perenne Pollen use in patients with renal impairment. Because the product is a biological protein degraded by cellular proteases rather than being excreted by the kidneys, renal dysfunction is not expected to affect the safety or efficacy of the treatment.
Liver disease does not affect the processing of allergenic extracts. No dosage adjustments are required for patients with any stage of hepatic impairment.
> Important: Special populations require individualized medical assessment to ensure the benefits of disease-modifying allergy treatment outweigh the potential risks of systemic reactions.
Lolium Perenne Pollen acts as an immunomodulator. The primary allergens in the pollen, such as Lol p 1 and Lol p 5, are recognized by the immune system. In allergic individuals, these proteins trigger a Th2-cell response. Immunotherapy works by introducing these allergens in controlled, increasing amounts to induce 'peripheral tolerance.' This involves:
The pharmacodynamic effect of Lolium Perenne Pollen is delayed. While some reduction in symptoms may be felt within weeks, the full 'disease-modifying' effect typically takes 6 to 12 months to become apparent. The duration of effect is significant; patients who complete a 3-to-5-year course often remain symptom-free for many years after stopping the treatment.
| Parameter | Value |
|---|---|
| Bioavailability | N/A (Biological Protein) |
| Protein Binding | N/A |
| Half-life | Days (as processed by immune cells) |
| Tmax | 1-2 hours (local tissue concentration) |
| Metabolism | Cellular Proteolysis |
| Excretion | Cellular waste/Lymphatic drainage |
Lolium Perenne Pollen extract is a complex mixture of proteins, glycoproteins, and polysaccharides. The most clinically relevant components are the Group 1 and Group 5 grass allergens. These are highly soluble in aqueous solutions and are standardized for potency using ELISA (Enzyme-Linked Immunosorbent Assay) to measure the concentration of specific major allergens.
Lolium Perenne Pollen is classified as a Standardized Pollen Allergenic Extract. It is part of the broader category of Allergen Immunotherapy (AIT) products. It is related to other grass pollen extracts like Timothy (Phleum pratense) and Orchard (Dactylis glomerata), which are often combined into 'Multi-Grass' formulations for patients with broad sensitivities.
Common questions about Standardized Perennial Rye Grass
Lolium Perenne Pollen is used as an allergenic extract for immunotherapy to treat seasonal allergic rhinitis and conjunctivitis caused by perennial ryegrass. It works by gradually desensitizing the immune system to the pollen, reducing symptoms like sneezing, itchy eyes, and nasal congestion. Unlike over-the-counter antihistamines, this treatment aims to provide long-term relief by addressing the underlying cause of the allergy. It is typically prescribed for patients who do not find sufficient relief from standard allergy medications. Treatment usually involves a multi-year commitment to achieve lasting results.
The most common side effects are local reactions at the site of administration. For injections, this includes redness, itching, and swelling at the injection site, which usually resolve within a day. For sublingual (under-the-tongue) forms, patients frequently report an itchy mouth, throat irritation, or mild swelling of the tongue. Some patients may also experience a temporary increase in their usual allergy symptoms, such as sneezing or a runny nose, shortly after the dose. Most of these effects are mild and decrease as the body becomes accustomed to the treatment.
There is no known direct chemical interaction between Lolium Perenne Pollen and alcohol. However, healthcare providers generally recommend avoiding alcohol for several hours after receiving an allergy shot or taking a sublingual dose. Alcohol can cause blood vessels to dilate, which might theoretically speed up the absorption of the allergen and increase the risk of a systemic reaction. Furthermore, alcohol can mask early symptoms of anaphylaxis, such as dizziness or flushing. Always consult your doctor regarding your lifestyle habits during immunotherapy.
Lolium Perenne Pollen is generally not started during pregnancy because the risk of a severe allergic reaction could harm the fetus by reducing oxygen supply. However, if a woman is already on a stable 'maintenance dose' and is tolerating it well, many doctors allow the treatment to continue. The decision is based on a careful risk-benefit analysis performed by an allergist. If you become pregnant while undergoing immunotherapy, notify your doctor immediately to discuss whether to continue or pause the treatment. It is never recommended to increase the dose while pregnant.
Immunotherapy with Lolium Perenne Pollen is a slow process and does not provide immediate relief. Most patients begin to notice a reduction in their allergy symptoms after 3 to 6 months of treatment, usually once they reach the maintenance phase. However, the full clinical benefit is typically seen after the first full grass pollen season following the start of therapy. For long-term 'cure' or significant disease modification, the treatment must usually be continued for 3 to 5 years. Consistency is key to the success of this pharmacological approach.
Stopping Lolium Perenne Pollen suddenly does not cause a withdrawal syndrome or physical danger. However, if you stop the treatment before completing the recommended 3-to-5-year course, your allergy symptoms are likely to return over time. The immune system requires prolonged exposure to the allergen to maintain its 'tolerant' state. If you need to stop due to side effects or financial reasons, discuss a plan with your allergist. If you pause for more than a few weeks and wish to restart, you may need to go through a build-up phase again for safety.
If you miss a dose, do not attempt to 'double up' the next time. The safety of immunotherapy depends on a specific schedule that keeps the immune system adjusted to the allergen. If you miss an injection by more than a few days, contact your allergist's office, as they may need to adjust your next dose downward to prevent a reaction. For sublingual tablets, if you miss one day, simply take the next scheduled dose as usual. If you miss multiple days of sublingual therapy, consult your physician before resuming.
There is no clinical evidence to suggest that Lolium Perenne Pollen allergenic extracts cause weight gain. Unlike systemic corticosteroids, which are sometimes used for severe allergies and can cause weight changes, immunotherapy is a targeted protein treatment that does not affect metabolism or appetite. If you experience unexplained weight gain while on this treatment, it is likely due to other factors or medications. Always discuss any unexpected physical changes with your healthcare provider to identify the underlying cause.
Lolium Perenne Pollen can be taken with most standard medications, but there are critical exceptions. You must inform your doctor if you are taking beta-blockers (often used for blood pressure or migraines), as these can make it difficult to treat a severe allergic reaction. Other medications like ACE inhibitors, MAOIs, and tricyclic antidepressants also require careful consideration. Most common allergy medications, like antihistamines and nasal sprays, are safe and often used alongside immunotherapy to manage symptoms during the build-up phase.
Lolium Perenne Pollen is a biological product, and the concept of 'generics' works differently than for synthetic pills. While there isn't a single 'generic' version, there are several manufacturers that produce standardized Perennial Ryegrass extracts. These extracts are often considered interchangeable if they have the same potency rating (e.g., BAU/mL). However, because these are complex biological mixtures, most allergists prefer to keep a patient on the same manufacturer's product throughout the course of treatment to ensure consistent dosing and safety.