Timothy Grass Pollen Allergen Extract Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 2, 2024.

Applies to timothy grass pollen allergen extract: sublingual tablet.

Precautions

It is very important that your doctor check your or your child's progress while you are using this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it.

This medicine may cause serious allergic reactions, including anaphylaxis. Anaphylaxis requires immediate medical attention. The most serious signs of this reaction are very fast or irregular breathing, gasping for breath, wheezing, or fainting. Other signs may include changes in color of the skin of the face, very fast but irregular heartbeat or pulse, hive-like swelling on the skin, and puffiness or swelling of the eyelids or around the eyes. If these side effects occur, get emergency help at once.

Your doctor may recommend that you have an emergency injection for allergic reactions available during the time of year you take this medication. If this is the case, make sure that you know how to use it properly for yourself or your child in case of a serious allergic reaction.

This medicine may increase risk of eosinophilic esophagitis. Check with your doctor right away if you or your child have severe chest pain or trouble swallowing while taking this medicine.

If you or your child have trouble breathing or if your asthma becomes difficult to control, call your doctor immediately.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Serious side effects

Along with its needed effects, timothy grass pollen allergen extract may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking timothy grass pollen allergen extract:

Other side effects

Some side effects of timothy grass pollen allergen extract may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

For healthcare professionals

Applies to timothy grass pollen allergen extract: sublingual tablet.

General adverse events

The most common side effects were ear pruritus, oral pruritus, tongue pruritus, mouth edema, and throat irritation.^[Ref]

Hypersensitivity

• Uncommon (0.1% to 1%): Systemic allergic reactions (including anaphylaxis)
• Postmarketing reports: Anaphylactic reaction, angioedema^[Ref]

Respiratory

• Very common (10% or more): Throat irritation (up to 22.6%)
• Common (1% to 10%): Pharyngeal edema, dry throat, oropharyngeal pain, nasal discomfort, throat tightness, dyspnea, pharyngeal erythema, cough, nasal congestion, sneezing
• Uncommon (0.1% to 1%): Rhinorrhea, dysphonia
• Postmarketing reports: Asthma exacerbation, hoarseness, laryngitis, induced asthma exercise, decreased forced expiratory volume, hyperventilation, laryngeal discomfort, decreased oxygen saturation, decreased peak expiratory flow rate, pneumonia, respiratory distress, status asthmaticus, decreased vital capacity, wheezing^[Ref]

Cardiovascular

• Common (1% to 10%): Chest discomfort
• Postmarketing reports: Chest pressure, increased heart rate, irregular heart rate, hypotension^[Ref]

Dermatologic

• Common (1% to 10%): Pruritus, urticaria
• Postmarketing reports: Facial erythema, rash^[Ref]

Gastrointestinal

• Very common (10% or more): Oral pruritus ( up to 26.7%), Lip pruritus (up to 11.1%), mouth edema ( up to 11.1%)
• Common (1% to 10%): Lip pruritus, oral paresthesia, tongue pruritus, lip swelling, swollen tongue, dyspepsia, oral hypoesthesia, nausea, oral discomfort, oral mucosal erythema, lip edema, glossitis, stomatitis, tongue disorder, tongue edema, glossodynia, dysphagia, palatal edema, glossodynia
• Uncommon (0.1% to 1%): Abdominal pain, gastroesophageal reflux, mouth swelling, oral/pharyngeal itching
• Postmarketing reports: Oral ulceration, ulcerative colitis exacerbation, diarrhea, eosinophilic esophagitis, oral pain, throat pruritus, vomiting^[Ref]

Nervous system

• Common (1% to 10%): Headache
• Postmarketing reports: Altered state of consciousness, difficulty speaking, dizziness, drowsiness, tremor^[Ref]

Other

• Very common (10% or more): Ear pruritus (up to 12.5%)
• Common (1% to 10%): Fatigue
• Uncommon (0.1% to 1%): Ear itching
• Postmarketing reports: facial edema, sensation of foreign body, neck swelling^[Ref]

See also:

Further information

Timothy grass pollen allergen extract side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

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