Allegra (fexofenadine) prescription available online

If you are suffering from allergies, Allegra can help. Get a new prescription or refill of Allegra from a board-certified doctor online.*

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Ease seasonal allergy symptoms

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*Prescriptions are provided at the doctor’s discretion. Learn more about our controlled substances policy and how you can save up to 80% with our prescription discount card.

About Allegra 

Allegra is an antihistamine that reduces the effects of a certain natural substance called histamine in the body. Histamine can produce allergy symptoms, such as sneezing, itching, watery eyes, and runny nose.

Allegra is used to treat seasonal allergies (hay fever) in adults and children. It can also help relieve skin itching and hives caused by chronic idiopathic urticaria. Allegra is available only by prescription. It is available in a generic formulation as well as under different brand names, including fexofenadine.

Allegra may be prescribed as a tablet or oral suspension. It’s always important to follow the specific instructions on your prescription, as they can vary based on the formulation and dosage prescribed.

If you're prescribed Allegra, be sure to complete the full course of the antihistamine unless your doctor specifically tells you to stop. If you don’t complete your prescription, the antihistamine may not fully treat your allergy symptoms.

Allegra uses

There are several FDA-approved uses for Allegra, but your healthcare provider may also prescribe it off-label to treat other medical conditions.

Your doctor may prescribe Allegra for any of the following reasons, or other reasons not listed here. If you have questions about why a medication is prescribed, ask your online doctor or pharmacist.

  • Seasonal allergic rhinitis

    Allegra is FDA-approved to treat seasonal allergic rhinitis and relieve allergy symptoms in adults and children 2 years and older.

  • Chronic idiopathic urticaria

    Allegra is FDA-approved to treat chronic idiopathic urticaria in adults and children 6 months and older.

Allegra side effects

  • The side effects associated with taking Allegra are typically mild. Most Allegra side effects are associated with gastrointestinal discomfort.

    Allegra has some common side effects. They may include:

    • Nausea, diarrhea, or upset stomach

    • Menstrual cramps

    • Drowsiness or tired feeling

    • Headache

    • Back or muscle pain

    Other side effects, which are less common but might be more severe, could include:

    • Serious allergic reaction

    • Fever

    • Trouble breathing

    Tell your doctor if you notice any adverse effects, or if you develop any other new or concerning symptoms.

How to take Allegra

Your pharmacist will provide you with instructions on how to take your Allegra prescription. Be sure to read your prescription label and follow the instructions. Call your doctor or pharmacy if you have any questions.

Allegra can come in different forms and doses, so be sure to follow the specific instructions on your prescription. Take regular Allegra tablets with a full glass of water. Avoid taking fexofenadine with any other type of liquid.

If you're taking the oral suspension, be sure to shake the liquid before measuring your dose. Measure your Allegra dose with a marked measuring spoon or measuring cup, not a regular kitchen spoon, to make sure you take the correct dose.

What to avoid while taking Allegra

Allegra has several drug interactions. Don’t change what you are taking without checking with your doctor or pharmacist. That includes other medications or supplements, as well as over-the-counter drugs. 

Possible drug interactions with Allegra include:

  • Other allergy medicines

  • Narcotic pain medicine

  • Sleeping pills

  • Muscle relaxers

  • Medication for depression, anxiety, or seizures

Avoid using antacids within 15 minutes of taking fexofenadine. Do not take Allegra with fruit juices, such as apple, orange, or grapefruit juice.

Avoid taking other cold or allergy medicine unless your doctor tells you otherwise. Because alcohol may increase drowsiness, talk to your doctor before drinking alcohol while taking fexofenadine.

Medication alternatives to Allegra

If your healthcare provider prefers to put you on another treatment altogether, they may suggest another allergy medication in another drug class. Here are some common doctor-recommended alternatives based on your health issue:

Allegra prescription FAQs

  • How much does Allegra cost?

    Depending on your pharmacy, Allegra tablets cost around $17 for five 180 mg tablets without insurance. Fortunately, generic brands, such as fexofenadine, offer an affordable alternative.

  • How can I refill my Allegra prescription?

    To refill your Allegra prescription,book a virtual appointment with one of our top rated board-certified doctors. After reviewing your symptoms, your doctor can send an electronic prescription to your local pharmacy.

  • Who should not take Allegra?

    Do not take Allegra if you've had an allergic reaction to fexofenadine. Tell your doctor if you're taking other medications that may cause drowsiness or if you have kidney disease.

  • How many days can Allegra be taken?

    It's safe to take Allegra every day for allergy symptoms as long as you're not taking other drugs that may interact with Allegra. Talk to your healthcare professional if you have any concerns about long-term Allegra use.

  • What happens if I miss a dose of Allegra?

    Since allergy medicine is usually taken as needed, you may not follow a dosing schedule. If you take Allegra regularly, take the missed dose as soon as you remember. Skip the missed dose if it's almost time for your next dose. Do not take two doses to make up for the missed dose.

  • What happens if you take Allegra more than once a day?

    Taking more than your usual dose of Allegra is unlikely to harm you. If you experience any adverse symptoms, call your doctor or local poison control center for advice about side effects.

3 simple steps to request your Allegra prescription today 

Step 1

Book an Allegra prescription request appointment.

Book a same day appointment from anywhere.

Step 2

Talk to your medical provider regarding your Allegra prescription.

Visit with a doctor on your smartphone or computer.

Step 3

Pick up your Allegra prescription.

We can send prescriptions to any local pharmacy.

Allegra prescription pricing details

How pricing works

To get a new or refill on your Allegra prescription, join our monthly membership and get discounted visits.

Paying with insurance



First month free



30 days of free membership

  • Same-day appointments 7 days a week

  • Unlimited messages with your Care Team

  • Prescription discount card to save up to 80%

  • Exclusive discounts on lab tests

  • Free memberships for your family

  • Cancel anytime

Visit price with insurance

Often the same as an office visit. Most patients with in-network insurance pay $30 or less!

  • We accept these insurance plans and many more:

    • Humana
    • Aetna
    • Cigna

Paying without insurance



First month free



30 days of free membership

  • Same-day appointments 7 days a week

  • Unlimited messages with your Care Team

  • Prescription discount card to save up to 80%

  • Exclusive discounts on lab tests

  • Free memberships for your family

  • Cancel anytime

Visit price without insurance

Initial visits are $129.

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If we're unable to treat you, we'll provide a full refund.


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PlushCare content is reviewed by MDs, PhDs, NPs, nutritionists, and other healthcare professionals. Learn more about our editorial standards and meet the medical team. The PlushCare site or any linked materials are not intended and should not be construed as medical advice, nor is the information a substitute for professional medical expertise or treatment.