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Astepro vs. Flonase: 6 Differences Between These Allergy Nasal Sprays

Christina Aungst, PharmDJoshua Murdock, PharmD, BCBBS
Published on May 14, 2024

Key takeaways:

  • Astepro (azelastine) and Flonase (fluticasone propionate) are two over-the-counter (OTC) nasal sprays that can help treat allergy symptoms. They have several differences to consider when comparing them.

  • Astepro and Flonase differ in how they work in the body, how fast they kick in, and what age ranges they’re FDA approved for. They also have distinct dosages and side effects to keep in mind.

  • Astepro and Flonase are available OTC as brand-name medications. But you can also find Flonase as a lower-cost generic. GoodRx can help make your prescription more affordable.

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Not all allergy medications are pills. Some of the most common treatments come as a nasal spray. But not all allergy nasal sprays are the same. Knowing their differences can help you choose the best one for you.

Astepro (azelastine) and Flonase (fluticasone propionate) are two popular allergy nasal sprays. They’re readily available over the counter (OTC). But you can also obtain them with a prescription from a licensed healthcare professional.

At first glance, Astepro and Flonase seem similar. They’re both effective for allergy relief, but they’re distinct in several ways. Let’s review six notable differences to consider when comparing Astepro and Flonase.

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1. Astepro and Flonase work in different ways

One of the main differences between Astepro and Flonase is that they treat allergies in different ways.

Astepro is an antihistamine. It works by blocking the effects of the chemical histamine. When our bodies come into contact with allergens, such as pollen or pet dander, certain immune cells release histamine. This chemical causes allergy symptoms, such as sneezing and runny nose. When Astepro blocks histamine, it lessens or stops allergy symptoms.

Flonase is a nasal corticosteroid (“steroid”). The way it works isn’t fully understood. But experts believe it works by lowering your immune cells’ response to allergens. Over time, this helps reduce swelling and irritation in the nose and sinuses.

2. Astepro starts working faster than Flonase

Another major difference between Astepro and Flonase is how long they take to start working.

Astepro starts working for allergy relief very quickly — in as little as 15 minutes. But it can also help prevent symptoms. If you know when you typically start having allergy symptoms, try starting daily Astepro about 2 weeks beforehand. This can stop allergies before they cause noticeable symptoms.

On the other hand, Flonase doesn’t usually work right away. Although you may notice some effects within a few hours, it can take up to 2 weeks for it to work consistently. But once it fully kicks in, Flonase is one of the most effective medications for allergy symptom prevention.

3. There are differences between OTC and prescription-only Astepro

You can get Astepro and Flonase OTC or with a prescription from a healthcare professional.

With Flonase, the OTC and prescription versions are very similar. They contain the same amount of the same active ingredients. Their labeled uses are slightly different, but this doesn’t typically affect how healthcare professionals choose between them. The choice between OTC and prescription Flonase often comes down to personal preference, accessibility, or cost.

OTC and prescription Astepro have more differences. The active ingredient is the same, but the concentration (the amount of medication per milliliter) is different. The two versions also have different FDA-approved uses.

This table highlights the differences between the OTC and prescription versions of Astepro and Flonase.

Medication name

Active ingredient and amount

Approved uses

OTC Astepro Allergy (azelastine HCl)

Azelastine hydrochloride 205.5 mcg per spray

Temporary relief of common upper respiratory allergy symptoms, such as sneezing and runny nose

Prescription azelastine HCl (brand-name Astelin no longer available)

Azelastine hydrochloride 1% (137 mcg per spray)

Treatment of upper respiratory symptoms caused by seasonal allergies

Treatment of vasomotor rhinitis (year-round stuffy and runny nose that isn’t from allergies)

OTC Flonase Allergy Relief (fluticasone propionate)

Fluticasone propionate 50 mcg per spray

Temporary relief of common upper respiratory allergy symptoms, such as sneezing and runny nose

Prescription fluticasone propionate (brand-name Flonase no longer available by prescription)

Fluticasone propionate 50 mcg per spray

Management of year-round nasal symptoms that aren’t from allergies

OTC Flonase Sensimist (fluticasone furoate)

Fluticasone furoate 27.5 mg per spray

Temporary relief of common upper respiratory allergy symptoms, such as sneezing and runny nose

Prescription fluticasone furoate (prescription product no longer available)

Fluticasone furoate 27.5 mg per spray

Treatment of upper respiratory symptoms caused by seasonal or year-round allergies

4. Astepro is approved for different age ranges than Flonase

An important part of choosing any medication is knowing what ages it’s safe for. Astepro and Flonase are both safe for adults to use. But when it comes to children, the safe age ranges vary for each nasal spray.

When self-treating allergies with Astepro OTC, it can be safely used by children ages 6 and older. The approved ages for prescription azelastine depends on why it’s being prescribed. For allergies, azelastine is approved for children 5 years and older. For vasomotor rhinitis, it’s approved for adolescents ages 12 and older.

Flonase Allergy Relief and prescription fluticasone propionate are both approved for use in children ages 4 and older. Flonase Sensimist is safe for children as young as 2 years old.

Good to know: Both versions of OTC Flonase have a warning on them regarding long-term use in kids. It’s not recommended to use them for more than 2 months total per year. This is because nasal steroids may slow a child’s growth. Astepro doesn’t have a warning about long-term use.

5. Astepro and Flonase have different dosages

Knowing your chosen medication’s typical dosage is another essential part of getting the most out of it. You’ll follow the same steps for both Astepro and Flonase, but how often you administer them varies. The dosage also depends on your age.

For OTC Astepro, the typical dosages are as follows:

  • Adults and children ages 12 and older: Use 2 sprays in each nostril once a day or use 1 or 2 sprays in each nostril every 12 hours. Don’t use more than 4 sprays in a 24-hour period.

  • Children ages 6 to 11: Use 1 spray in each nostril every 12 hours. Don’t use more than 2 sprays in a 24-hour period.

For OTC Flonase, the recommended dosages are as follows:

  • Adults and children ages 12 and older: Use 2 sprays in each nostril once a day for 1 week. After that, use 1 or 2 sprays in each nostril once a day. After 6 months of use, talk with a healthcare professional about whether you should keep using Flonase.

  • Children ages 4 to 11 (Flonase Allergy Relief): Use 1 spray in each nostril once a day. Use for the shortest amount of time needed. Talk to your child’s pediatrician if they need to use Flonase for more than 2 months total per year.

  • Children ages 2 to 11 (Flonase Sensimist): Use 1 spray in each nostril once a day. Use for the shortest amount of time needed. Talk to your child’s pediatrician if they need to use Flonase for more than 2 months total per year.

6. Astepro and Flonase have different side effects

Both Astepro and Flonase are well tolerated, but their side effects vary. You should consider these differences when choosing between them.

Common or mild Astepro side effects include:

  • Bloody nose

  • Nasal discomfort

  • Sneezing

  • Bitter or bad taste

  • Headache

  • Drowsiness

Common or mild Flonase side effects include:

  • Headache

  • Sore throat

  • Bloody nose

  • Coughing or wheezing

  • Nausea

Beyond these milder side effects, Flonase has one serious side effect that Astepro does not. There is a potential risk of slowed growth when children use nasal steroids, such as Flonase, for long periods of time. One study suggests that this side effect becomes clinically significant about 2 months after starting treatment. That’s why there’s a warning on Flonase’s OTC label to speak with a child’s pediatrician regarding long-term use.

Can you combine Astepro and Flonase?

Yes, you can use both Astepro and Flonase if needed. Experts actually recommend the combination for people who have moderate to severe allergy symptoms. It’s also a good strategy if one nasal spray isn’t working well enough by itself.

You may find the combination starts working faster than Astepro can on its own. Some studies suggest it may provide noticeable relief in as little as 5 minutes.

Good to know: The nasal spray Dymista (azelastine / fluticasone) combines the active ingredients found in Astepro and Flonase. Dymista isn’t available OTC. But it could be a more convenient option if you regularly use both medications.

How to save on Astepro and Flonase

There are ways to save on Astepro and Flonase. Both are available as brand-name medications. But you can find OTC Flonase Allergy Relief as a lower-cost generic. The prescription versions of both azelastine and fluticasone propionate are available as generic medications.

By having a licensed healthcare professional write a prescription for OTC Flonase or Astepro, GoodRx can help you save.

  • Save on azelastine with GoodRx. GoodRx can help you save over 55% off the average retail price. The price of the prescription version of azelastine at certain pharmacies is as low as $15.00 with a free GoodRx discount.

  • Save on Flonase with GoodRx. GoodRx can help you save over 55% off the average retail price. The price of generic Flonase Allergy Relief at certain pharmacies is as low as $18.87 with a free GoodRx discount. Flonase Sensimist’s price at certain pharmacies may be as low as $27.92. And the prescription version of fluticasone propionate may cost as little as $14.28.

  • Save on Astepro with a coupon from the manufacturer. If you’re purchasing brand-name Astepro without a prescription, the manufacturer has a $2 coupon available, which you can have emailed to you.

  • Save on Flonase with a coupon from the manufacturer. If you’re purchasing brand-name Flonase without a prescription, the manufacturer has a $4 coupon available, which you can have emailed to you.

The bottom line

Astepro (azelastine) and Flonase (fluticasone propionate) are two popular over-the-counter allergy nasal sprays. They’re different in how they work, how fast they work, and what age ranges they’re approved for. Their dosages and side effects also vary. If needed, you can combine Astepro and Flonase for added allergy relief.

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Why trust our experts?

Christina Aungst, PharmD
Christina Aungst, PharmD, is a pharmacy editor for GoodRx. She began writing for GoodRx Health in 2019, transitioning from freelance writer to editor in 2021.
Joshua Murdock, PharmD, BCBBS
Joshua Murdock, PharmD, BCBBS, is a licensed pharmacist in Arizona, Colorado, and Rhode Island. He has worked in the pharmacy industry for more than 10 years and currently serves as a pharmacy editor for GoodRx.
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GoodRx Health has strict sourcing policies and relies on primary sources such as medical organizations, governmental agencies, academic institutions, and peer-reviewed scientific journals. Learn more about how we ensure our content is accurate, thorough, and unbiased by reading our editorial guidelines.

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