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We offer competitive pricing on all our medications. Find a lower price? We'll match it from any verified Canadian online pharmacy! Know More
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Select the prescribed dosage and quantity, then proceed to checkout.
Sign in or create a new account.
Upload your prescription.
Complete your purchase by processing the payment.
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Grastek (Timothy grass pollen allergen extract) is a prescription sublingual immunotherapy tablet used to reduce grass-pollen allergy symptoms by training the immune system over time. It’s a brand name medicine, and you will need a valid prescription to buy it.
You take one tablet daily under your tongue, usually starting a few months before pollen season begins. Grastek is approved and designed to build your body’s tolerance to grass allergens with steady and daily use.
Grastek is meant for children and adults ages 5 to 65 and can make allergy seasons easier year after year. While it’s not a cure, it may reduce how often you need antihistamines or nasal sprays and help you breathe easier when pollen counts are high.
Your first dose must be given at your doctor’s office, and you’ll be prescribed an epinephrine auto-injector (like an EpiPen) just in case of a severe reaction, though such cases are rare. Over time, many patients notice fewer flare-ups, milder symptoms, and a better quality of life during allergy season.
| Generic Name | Timothy grass pollen allergen extract |
| Brand Name | Grastek |
| Forms | Sublingual (under-tongue) tablet |
| Strengths Available | 2800 BAU (Bioequivalent Allergy Units) per tablet |
| Packaging | 30 tablets per package |
| Requires Prescriptionm | Prescription only (Rx) |
| Ships to the U.S. | Yes |
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Grastek is used to treat grass pollen–induced allergic rhinitis, with or without conjunctivitis (symptoms affecting both the nose and eyes).
Grastek Dosage for Allergic Rhinitis (Grass Pollen Allergy)
To get the most out of Grastek while minimizing risks, here’s how you should take this medicine:
Grastek gradually re-trains the immune response so your body reacts less vigorously to grass pollen. It makes it possible by exposing your immune system daily to a controlled and small amount of allergen. Over time, this dampening of allergic response reduces symptoms and the need for rescue allergy medications.
Note: Contact your health care provider if you experience any serious symptoms or unusual changes.
Before using Grastek, keep these cautions in mind:
To keep your treatment safe and effective while using Gratek, stay mindful of these precautions:
When to contact your doctor: Stop Grastek and seek medical help if you develop trouble breathing, chest tightness, severe throat swelling, or trouble swallowing. Report persistent mouth/throat pain or new swallowing difficulties.
If you miss a dose, take it as soon as you remember that same day. If it’s nearly time for your next dose, skip the missed one. Do not try to double up on your doses. Then resume your regular daily schedule.
An overdose of Grastek is unlikely if you use it as prescribed. If someone takes more than the prescribed dose and experiences symptoms like severe throat swelling or breathing difficulty, seek emergency medical attention right away. You may also call the poison control center at 1-800-222-1222 toll-free.
To keep your Grastek tablets stable and safe, follow these instructions to store them properly:
Before taking Grastek, tell your doctor about all prescription, over-the-counter, and herbal products you use. Some medications can affect how allergic reactions are managed if they occur.
| Drug Category | Examples | Effect or Precaution |
|---|---|---|
| Beta-blockers | Propranolol, Atenolol, Metoprolol | May reduce the effectiveness of epinephrine during anaphylaxis. Use only under close medical supervision. |
| MAO Inhibitors & Tricyclic Antidepressants | Phenelzine, Selegiline, Amitriptyline, Imipramine | Can intensify epinephrine’s cardiovascular effects (rapid heartbeat, high blood pressure); tell your doctor before use. |
| Other Allergen Immunotherapies | Oralair (five grass pollen), Ragwitek (ragweed pollen), Odactra (house-dust mite) | Should not be combined with Grastek unless specifically directed by an allergist. |
| Asthma Medications | Inhaled steroids (fluticasone), rescue inhalers (albuterol) | Continue as prescribed, but do not start Grastek if asthma is severe or uncontrolled. |
| Common Allergy Symptom Relievers | Cetirizine (Zyrtec), Loratadine (Claritin), Fexofenadine (Allegra), Fluticasone nasal spray (Flonase) | May be safely used alongside Grastek for breakthrough symptoms; follow your doctor’s advice. |
| Active Oral Inflammation / Dental Procedures | Mouth ulcers, recent tooth extraction, and oral surgery | Pause Grastek until the mouth is healed to avoid increased local irritation. |
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Important Note: Do not start, stop, or combine allergy medications or immunotherapy treatments without consulting your allergist or pharmacist. Always keep your epinephrine auto-injector available and inform health care professionals that you’re using Grastek.
If Grastek is not ideal for you, your doctor might suggest these alternative medicines:
| Grastek Alternative | Form | Allergens It Contains | Best For |
|---|---|---|---|
| Oralair | SLIT tablet | Five grass pollens | Multi-grass sensitization |
| Ragwitek | SLIT tablet | Ragweed pollen | Ragweed allergy |
| Odactra | SLIT tablet | House dust mite | Perennial dust mite allergy |
| Allergy Shots (SCIT) | Subcutaneous | Customized allergen mix | Multi-sensitized or severe cases |
| Symptom Control (OTC/Rx) | Pharmacologic | Antihistamines, nasal steroids | Breakthrough symptoms |
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At Polar Bear Meds, we’re committed to making prescription medications more accessible and affordable for patients in the USA. Our Grastek prices are significantly lower than typical U.S. pharmacy retail rates without compromising on safety or quality.
Every order is sourced exclusively from licensed and trusted pharmacies. When you buy this Timothy grass pollen allergen extract tablet, it undergoes complete prescription verification to ensure compliance and authenticity. We offer discreet, trackable shipping to all U.S. states, along with refill support for ongoing treatment.
Save more by using the Grastek coupon code “WELCOMEPB10” for 10% off on your first order. There are no hidden handling or processing fees, as we believe in complete transparency.
Looking to save even more? Join our referral program & earn a $20 credit every time you refer a friend or family member. After every 10 verified customer referrals, you'll receive a $100 credit in your account as a thank-you for spreading the word.
AtPolar Bear Meds, your safety is our priority. Every order is dispensed from a fully licensed Canadian pharmacy following strict standards for quality, security, and patient care. To conveniently buy Grastek from Canada at a substantial cost, call us at 1-888-779-2193 toll-free.

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.
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