Drug Interactions between Cardura and ragweed pollen allergen extract

Consuming food or beverage during or immediately after using ragweed 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 ragweed pollen allergen extract. Use of alcohol with ragweed pollen allergen extract may increase the risk and severity of allergic reactions that can sometimes occur during treatment with ragweed pollen allergen extract. Potentially life-threatening or fatal reactions may occur. Talk to your doctor if you have any questions or concerns. Stop using ragweed 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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Ask your doctor before using doxazosin together with ethanol. Using doxazosin with ethanol can lower your blood pressure. This can cause dizziness or feeling like you might pass out, especially when getting up from a sitting or lying position. This may be more likely to occur when you first start taking either of these medications. You may need a dose adjustment or need your blood pressure checked more often if you take both medications. You may develop flushing, warmth or redness under your skin or tingly feeling after alcohol intake (especially in you are of Asian descent) and should be advised to avoid alcohol or limit your intake. 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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