Drug Interactions between Grastek and mixed grass pollens allergen extract

Consuming food or beverage during or immediately after using timothy grass pollen allergen extract may reduce the amount of allergen extract available for absorption from tissues under the tongue into the blood stream. Food or beverage should not be taken with, or for at least 5 minutes after, using timothy grass pollen allergen extract. Use of alcohol with timothy grass pollen allergen extract may increase the risk and severity of allergic reactions that can sometimes occur during treatment with timothy grass pollen allergen extract. Potentially life-threatening or fatal reactions may occur. Talk to your doctor if you have any questions or concerns. Stop using timothy grass pollen allergen extract, administer epinephrine, and seek immediate medical attention if signs and symptoms of an allergic reaction develop such as trouble breathing, swallowing, or speaking; throat tightness or swelling; dizziness, lightheadedness, or fainting; rapid or weak heartbeat; severe stomach cramps or pain; vomiting or diarrhea; and/or severe flushing or itching. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Consuming food or beverage during or immediately after using mixed grass pollens allergen extract may reduce the amount of allergen extract available for absorption from tissues under the tongue into the blood stream. Food or beverage should not be taken with, or for at least 5 minutes after, using mixed grass pollens allergen extract. Use of alcohol with mixed grass pollens allergen extract may increase the risk and severity of allergic reactions that can sometimes occur during treatment with mixed grass pollens allergen extract. Potentially life-threatening or fatal reactions may occur. Talk to your doctor if you have any questions or concerns. Stop using mixed grass pollens allergen extract, administer epinephrine, and seek immediate medical attention if signs and symptoms of an allergic reaction develop such as trouble breathing, swallowing, or speaking; throat tightness or swelling; dizziness, lightheadedness, or fainting; rapid or weak heartbeat; severe stomach cramps or pain; vomiting or diarrhea; and/or severe flushing or itching. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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The recommended maximum number of medicines in the 'grass pollen extracts' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'grass pollen extracts' category:

• Grastek (timothy grass pollen allergen extract)
• mixed grass pollens allergen extract

Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.