For U.S. Residents Only
Sanofi logo
A field of daisies

Types of Allergens

Learn more about different types of allergens

More than 24 million Americans suffer from allergies. If you’re one of them, there are a pretty wide range of allergens that could be causing your symptoms.

An allergen is any type of substance that your body views as a “harmful invader.” When your body comes into contact with this invader, it releases histamine into your bloodstream — a chemical compound that is responsible for the uncomfortable allergy symptoms that you experience.

Oftentimes, it’s difficult to identify what your specific allergy triggers are. But with so many different types of allergies out there, it’s important to try and figure out what’s responsible for your symptoms. Then you can take steps toward effective relief with guidance from your primary care physician or allergist.

Common indoor and outdoor allergens

There are two basic subsets of allergens: indoor and outdoor. You’ll likely know which group you suffer from based on where and when your symptoms typically occur. However, it’s also possible to experience reactions to both indoor and outdoor allergens.

  • Common indoor allergens
    • Dust mites – microscopic organisms that thrive in humid spaces, often clinging to fabrics.
    • Pet allergies – allergens found in the saliva, urine or dander of an animal with fur. (That’s right, their hair or fur itself is not the problem.)
    • Mold spores – the seeds of a fungus that travel through the air, thriving in damp or humid environments.

Learn all about indoor triggers.

  • Common outdoor allergens
    • Pollen from grass, weeds and trees – tiny grains that travel easily through the wind.
    • Mold spores – seeds that travel much like pollen, and hit their peak during late summer or early fall.

Learn all about outdoor triggers.

That list only includes a few of the most common allergens. Reactions to indoor or outdoor allergens may appear in childhood, or they may manifest later in life. Either way, the sooner that you can address your symptoms, the sooner you can get relief.

What are environmental allergies?

Another distinction to be aware of is environmental allergies versus seasonal allergies. Environmental allergies are experienced year-round, while seasonal allergies occur at different times of the year, depending on the specific allergens at play.

Stay one step ahead of respiratory allergens and more

You might not be able to make allergens disappear, but you can always seek effective relief from your symptoms.

Allegra offers the relief that you need, with a variety of options for different symptoms and ages. Before taking Allegra, be sure to read all directions and warnings on the product label, which you can also find at each product link below.

Both 12 Hour Allegra and 24 Hour Allegra tablets contain an antihistamine that tackles your indoor and outdoor allergy symptoms.

12 Hour Allegra-D and 24 Hour Allegra-D tablets contain an antihistamine and decongestant to help you breathe freely without feeling drowsy. They are great options for those suffering from nasal congestion, sinus congestion and pressure and swelling of the nasal passages.

And for kids, 12 Hour Children’s Allegra liquid or orally dissolving tablets provide effective, non-drowsy, long-lasting relief.*

While there are plenty of options in the allergy aisle, only Allegra is the #1 Allergist recommended brand for non-drowsy relief. Try Allegra today to get back to all of life’s adventures.

*Children’s Allegra lasts a full 12 hours.
Allegra is the #1 allergist recommended non-drowsy brand of OTC 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

Allegra

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
https://www.allegra.com/wp-content/themes/allegra/assets/images/ua-dusty-book_692w.jpg

Leave your allergy symptoms in the dust.

Save up to $7 on Allegra Buy Allegra