Generic Name: Fexofenadine

  • What is Allegra?

    Allegra relieves the runny nose, sneezing, and itchy, red, watery eyes that are associated with seasonal allergies. It is also used to relieve the symptoms of hives.

  • What is the most important information I should know about Allegra?

    It is important to take Allegra regularly, as your doctor prescribes, even when you start to feel better. Waiting too long between doses gives your symptoms a chance to worsen. However, you should not exceed the recommended dose that your doctor has instructed you to take.

  • Who should not take Allegra?

    Do not begin treatment with Allegra if you are allergic to any of its ingredients.

  • What should I tell my doctor before I take the first dose of Allegra?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Allegra. Also, talk to your doctor about your complete medical history, especially if you have a genetic disorder called phenylketonuria (an inability to process phenylalanine), kidney problems, or if you are pregnant, plan to become pregnant or are breastfeeding.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Seasonal Allergies and Hives

    Adults and children ≥12 years: The recommended dose is 60 milligrams (mg) twice daily or 180 mg once daily.

    Children 2-11 years: The recommended dose is 30 mg twice daily.

    Children 6 months to <2 years (for treatment of hives): The recommended dose is 15 mg twice daily.

  • How should I take Allegra?

    Allegra tablets should be taken with water.

    Allegra orally disintegrating tablets (ODT) should be taken on an empty stomach. Allow the tablet to disintegrate on the tongue before swallowing, with or without water.

    Allegra oral suspension should be shaken well before each use.

  • What should I avoid while taking Allegra?

    Do not exceed the recommended dose as prescribed by your doctor.

    Only take Allegra with water; do not take with any type of fruit juice.

    Do not chew Allegra ODT tablets.

  • What are possible food and drug interactions associated with Allegra?

    If Allegra is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Allegra with the following: aluminum- and magnesium-containing antacids (such as Maalox), erythromycin, or ketoconazole.

    Do not take Allegra with fruit juices such as grapefruit, orange, or apple juice.

  • What are the possible side effects of Allegra?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: headache, upper respiratory tract infection, fever, back pain, cough, dizziness, nausea, menstrual pain, drowsiness, fatigue, upset stomach

  • Can I receive Allegra if I am pregnant or breastfeeding?

    The effects of Allegra during pregnancy and breastfeeding are unknown. Talk with your doctor before taking this drug if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of Allegra?

    Take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Do not take two doses at once.

  • How should I store Allegra?

    Store at room temperature.

Meet the Pharmacists

I'm Shereen A. Gharbia, PharmD. Welcome to PDR Health!

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