Grastek® (Timothy Grass Pollen Allergen Extract – Phleum pratense)
Grastek® is a once-daily sublingual immunotherapy (SLIT) tablet indicated for the treatment of Timothy grass and related grass pollen–induced allergic rhinitis, with or without conjunctivitis, in adults and children 5 years of age and older. Unlike standard allergy medications that temporarily relieve symptoms, Grastek works by gradually modifying the immune response to reduce seasonal allergy symptoms over time.
Buy Grastek – Timothy Grass Allergy Tablet (Sublingual Immunotherapy)
Grastek® contains a standardized extract of Timothy grass (Phleum pratense) pollen and is designed to reduce the signs and symptoms of seasonal grass pollen allergies. It belongs to a class of treatments known as allergen immunotherapy. Rather than simply masking symptoms such as sneezing or nasal congestion, Grastek aims to help your immune system become less reactive to grass pollen exposure.
Many patients search for options to buy Grastek online due to the recurring cost of seasonal allergy management. LifePath Meds provides eligible patients access to prescription medications at more affordable pricing while maintaining the same regulated quality standards required for prescription therapies.
What Grastek Is Used For
Grastek is indicated for the treatment of moderate to severe allergic rhinitis triggered by Timothy grass and related grass pollens. It may be used with or without allergic conjunctivitis.
Common symptoms treated include:
- Sneezing
- Runny nose (rhinorrhea)
- Nasal congestion
- Itchy nose
- Watery, itchy, or red eyes
- Throat irritation related to postnasal drip
Before initiating treatment, a healthcare provider confirms the diagnosis using allergy testing such as a skin prick test or a blood test measuring specific IgE antibodies to Timothy grass pollen.
Understanding Seasonal Grass Pollen Allergy
Seasonal allergic rhinitis, often referred to as “hay fever,” occurs when the immune system overreacts to airborne allergens such as grass pollen. In sensitized individuals, exposure to pollen triggers the release of histamine and other inflammatory mediators, leading to nasal and eye symptoms.
Timothy grass pollen is one of the most common causes of seasonal allergies in North America and Europe. Symptoms typically occur during late spring and early summer when grass pollen counts are elevated.
Conventional treatments—such as antihistamines and nasal corticosteroids—relieve symptoms but do not address the underlying allergic sensitivity. Immunotherapy, including Grastek, aims to reduce that sensitivity.
How Grastek Works
Grastek is a sublingual immunotherapy (SLIT) tablet. Each tablet contains 2800 BAU (Bioequivalent Allergy Units) of standardized Timothy grass pollen extract.
By exposing the immune system to controlled amounts of allergen under the tongue on a daily basis, Grastek promotes immunologic tolerance. Over time, this process may:
- Reduce IgE-mediated hypersensitivity
- Increase regulatory T-cell activity
- Shift immune response away from allergic inflammation
- Decrease seasonal symptom severity
- Reduce reliance on rescue allergy medications
The goal is long-term modification of the allergic response rather than short-term symptom suppression.
Dosage Form and Strength
- Dosage Form: Sublingual tablet
- Strength: 2800 BAU
- Route: Administered under the tongue
- Frequency: Once daily
The tablet is designed to dissolve quickly under the tongue without the need for water.
Who Can Use Grastek
- Adults aged 18 and older with confirmed Timothy or related grass pollen allergy
- Children aged 5 years and older with confirmed allergy
Safety and efficacy have not been established in children under 5 years of age. Clinical experience in adults over 65 years of age is limited.
Who Should Not Use Grastek (Contraindications)
Grastek is contraindicated in patients who:
- Have severe, unstable, or uncontrolled asthma
- Have had a prior severe systemic allergic reaction to grass pollen immunotherapy
- Are hypersensitive to any ingredient in the tablet
- Are currently taking beta-blockers
- Have active inflammatory conditions in the mouth (e.g., severe oral ulcers, infections, or recent oral surgery)
Important Safety Warnings
Risk of Anaphylaxis
Grastek can cause serious allergic reactions, including life-threatening anaphylaxis. Because of this risk:
- The first dose must be administered under medical supervision.
- Patients must be observed for at least 30 minutes after the first dose.
- Patients should be educated about recognizing signs of a severe allergic reaction.
Oral and Dental Conditions
Treatment should be temporarily interrupted in patients with mouth ulcers, oral infections, or following dental extractions or surgery until complete healing has occurred.
Eosinophilic Esophagitis (EoE)
Eosinophilic esophagitis has been reported with SLIT products. Discontinue treatment and consult a healthcare provider if symptoms such as difficulty swallowing, persistent heartburn, or chest pain occur.
Asthma Monitoring
Patients with asthma must have stable disease prior to initiation. If asthma worsens during treatment, Grastek should be discontinued and medical advice sought promptly.
How to Take Grastek – Step-by-Step Instructions
- Wash and dry your hands.
- Carefully peel back the foil from the blister pack (do not push the tablet through).
- Place the tablet immediately under the tongue.
- Allow it to dissolve completely.
- Avoid swallowing for approximately one minute.
- Do not eat or drink for at least five minutes afterward.
Do not chew or swallow the tablet whole.
When to Start Treatment
For optimal benefit during the first pollen season, treatment should begin at least 8–12 weeks before the anticipated start of grass pollen season and continue throughout the season.
Depending on clinical assessment, treatment may continue for multiple seasons to maintain benefit.
Missed Dose Instructions
- If a dose is missed, resume the next day.
- Do not take more than one tablet per day.
- If several doses are missed, consult your healthcare provider before restarting.
Common Side Effects
Most side effects are mild to moderate and localized to the mouth and throat.
- Oral itching
- Throat irritation
- Ear itching
- Mild tongue or lip swelling
- Nausea
- Stomach discomfort
These reactions often decrease as the immune system adjusts to therapy.
Serious Side Effects – When to Seek Emergency Care
- Difficulty breathing
- Swelling of the throat
- Severe dizziness or fainting
- Rapid onset of widespread rash or hives
- Voice changes
Immediate medical attention is required if these symptoms occur.
Drug Interactions
Formal interaction studies are limited. However, beta-blockers are of particular concern because they may reduce the effectiveness of epinephrine used to treat anaphylaxis.
Inform your prescriber of all medications and supplements before starting therapy.
Comparison with Other Allergy Treatments
Antihistamines
Provide rapid symptom relief but do not alter disease progression.
Intranasal Corticosteroids
Effective for inflammation control but require daily seasonal use.
Allergy Shots (Subcutaneous Immunotherapy)
Administered by injection in a medical office over several years. Grastek offers a needle-free alternative with at-home dosing after the first supervised dose.
Storage Instructions
- Store at 15°C–30°C (59°F–86°F).
- Keep in original blister packaging until use.
- Protect from moisture.
- Keep out of reach of children.
Buying Grastek Online
Allergy treatment can be costly, particularly when used season after season. LifePath Meds helps eligible patients access Grastek at competitive pricing. Patients should ensure they have a valid prescription and consult their healthcare provider before initiating therapy.
Planning ahead is essential. Speak with your prescriber early—ideally several months before grass pollen season—to ensure treatment is started on schedule.
How to Use Summary
Take one tablet daily under the tongue. Allow it to dissolve completely. Avoid eating or drinking for at least five minutes after dosing. Continue treatment as prescribed to build immune tolerance and reduce seasonal allergy symptoms over time.
