For U.S. Residents Only
Sanofi logo
A woman sneezing into a tissue A woman sneezing into a tissue

Allergy Symptoms & Relief

Take control of your allergy symptoms

Whether your symptoms are mild or severe, seasonal or year-round, finding the source of your allergies can be a frustrating journey. Once you narrow down your main triggers, you’ll be one step closer to finding a path to relief that works for you.

How are allergies diagnosed?

While some allergies are easier to diagnose than others, you can get a better idea of your exact triggers from an allergist. During your visit with a health professional, they will likely ask about your medical and family history, lifestyle and your symptoms before conducting an allergy test. This examination will typically require a skin test or blood test. Once your results come back, your doctor can help personalize a plan to relieve your symptoms, which may include an over-the-counter allergy medicine like Allegra or Allegra-D.

What are the symptoms of allergies?

When you’re exposed to allergens, your immune system produces antibodies that release histamines. These histamines are used to combat the allergens, which subsequently causes your allergy symptoms. Common allergy symptoms include:

  • Itchy/watery eyes – indoor and outdoor allergens can get into your eyes through exposure to the air or from you touching an allergen and then rubbing your eyes. Both the inside of the eyelid and the outside of the eyeball can become inflamed, as a result.
  • Itchy nose and throat – allergens are irritants to your nose and throat and can cause you to produce excess mucus that drains into the back of your throat.
  • Sneezing – this is your body’s way of expelling unwanted particles or germs—in this case, allergens—from your nose and throat.
  • Runny nose – allergens can enter and irritate the nose, causing inflammation and increased, thicker mucus.
  • Sinus congestion – your sinuses are located behind the eyes, in the forehead and in the cheeks. Allergens enter the sinuses through your airways and can cause inflammation and pain.

Ways to prevent allergies

Consider these tips to help prevent your exposure to allergens.

  • Avoiding mold allergies
    • Quickly repair leaks in the bathroom and clean sinks and tub monthly
    • Never leave wet clothes out and make sure the laundry area has a quality circulation
    • Improve airflow in the bedroom and clean frequently
    • Clean your fridge regularly and use an exhaust fan while cooking
  • Avoiding pet allergies
    • Keep pets out of the bedroom so that their dander doesn’t contaminate your sheets
    • Keep your home uncluttered and the furniture as clean as possible
    • Opt for non-carpeted flooring to avoid the accumulation of dust
    • Vacuum frequently and use an allergy-friendly filter if possible
    • Change clothes after a long period of exposure to a dog or cat
    • Bathe your pet weekly to limit the build-up of allergens
    • Brush your pets outside to avoid shedding in the house
      Learn more about pet allergies.
  • Avoiding pollen allergies
    • Check pollen count and forecast before leaving the house with Allegra’s online counter
    • Avoid yard work during pollen seasons
    • Stay indoors when pollen counts are high
    • Shower frequently to remove any pollen from your hair or skin
    • Change and wash clothes after worn outside
    • Limit contact with pets in case they are carrying any pollen on their skin or fur

How can Allegra help?

Allegra has plenty of options for your whole family that will help relieve all kinds of symptoms. 12 Hour Allegra and 24 Hour Allegra tablets deliver an antihistamine that tackles your indoor and outdoor allergy symptoms, while 12 Hour Allegra-D and 24 Hour Allegra-D tablets contain an antihistamine and nasal decongestant to help you breathe freely without feeling drowsy. If your kids are feeling bogged down by their allergies, we also offer 12 hour Children’s Allegra liquid or orally dissolving tablets to give them lasting relief.*

Allegra can help you get back to enjoying life’s greatest adventures. It’s the #1 Allergist recommended brand for non-drowsy relief. Allegra’s antihistamine gives you 24 hours of the fastest non-drowsy relief from indoor and outdoor allergy symptoms so you can live your life, not your allergies.

*Children’s Allegra lasts a full 12 hours.
Allegra is the #1 allergist recommended non-drowsy brand of OTC oral antihistamines.
Starts working in one hour. Applies to first dose only. Among single-ingredient OTC branded oral antihistamines.

A woman comparing allergy products

Compare Allegra

See how Allegra compares to
other popular allergy relief brands.

See The Difference
A woman working with flowers

Learn the Ins & Outs of Allergies

Learn about common triggers,
symptoms and more.

Understand Your Allergies


A non-drowsy, fast-acting§ antihistamine to relieve your everyday allergy symptoms.

§Starts working in one hour.

Leave your allergy symptoms in the dust.

Save up to $7 on Allegra Buy Allegra

Leave your allergy symptoms in the dust.

Save up to $7 on Allegra Buy Allegra