Flonase is a nasal corticosteroid that helps relieve symptoms of nasal infection. It’s the branded version of Fluticasone.
Nasal infections are caused by viruses or bacteria. Depending on how serious the infection is, you’ll need treatment with antiviral or antibiotics. Flonase can’t treat the infection, but it’s a nasal corticosteroid that can relieve symptoms like nasal congestion and swelling.
How does Flonase work?
Fluticasone, the active ingredient in Flonase, is a corticosteroid that helps calm to limit the response of inflammatory cells in the body, which are triggered when the immune system detects a threat (like an infection). By doing this, Fluticasone helps to reduce swelling and inflammation, relieving symptoms like nasal congestion and discomfort.[1]
What doses of Flonase are there?
Flonase nasal spray is available in one dose of 27.5mcg. The typical dosage is one to two sprays in each nostril for around a week.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr. Joseph Palumbo on January 23, 2025. Next review due on January 23, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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How to use Flonase
You’ll need to prime the bottle if you’re using Flonase for the first time or if you haven’t used it in a few days.
Shake the bottle.
Remove the cap.
Press the pump a few times until a fine mist is produced.
To use Flonase:
Shake the bottle.
Blow your nose gently.
Place the nozzle near the tip of the nostril.
While breathing in through your nose, press the pump down.
Repeat steps 2-4 for the other nostril.
How long does Flonase take to work?
You should notice an improvement in your symptoms within a few days. Your nose should feel less stuffy and clearer. If your symptoms don’t improve after a week, let the clinician who prescribed it for you know. They may suggest another treatment or changes to your administration.
What should I do if I make a mistake when using Flonase?
You might be more likely to develop side effects if you use too much Flonase. But if you accidentally sprayed only slightly more than the recommended amount, this risk is thought to be minimal. If you’re concerned or have any questions, ask your doctor for advice.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr. Joseph Palumbo on January 23, 2025. Next review due on January 23, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Flonase isn’t suitable for everyone, and there are some things that you need to be aware of when using it.
Here’s all the official info on it. If anything is unclear, let our doctor know, and they can talk with you about it.
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Flonase: FAQ
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
Will I get side effects using Flonase?
Answer:
Like all medicines, there's a chance of experiencing side effects while using Flonase. These side effects include:
nosebleeds,
nose ulceration,
irritation or discomfort,
headache, and
shortness of breath.
The side effects shouldn’t last long and will likely go away once you stop using the medicine. However, if you experience more than three nosebleeds in a week, stop using the treatment and seek medical attention.
Is there a generic version of Flonase?
Answer:
Yes, there is a generic version of Flonase called Fluticasone. Both medicines contain the same active ingredient but in different concentrations. Each spray of Flonase contains 27.5 mcg of fluticasone, while Fluticasone contains 50 mcg per spray. You can choose either one, but the generic version is usually cheaper.
Is Flonase a steroid?
Answer:
Yes, Flonase is a nasal corticosteroid medication commonly used to treat allergy symptoms like sneezing and stuffy nose. Because of its anti-inflammatory properties, it can be used to treat symptoms of nasal infections, such as nasal congestion and swelling. Steroids won’t treat the infection itself, but can help with the associated symptoms.
Can I use Flonase if I’m pregnant?
Answer:
Flonase is generally considered safe for use during pregnancy and while breastfeeding. Since it contains only small concentrations of the active ingredient, only a minimal amount enters the bloodstream or breast milk. These tiny amounts are unlikely to harm the baby. However, you should still let your clinician know if you’re pregnant, breastfeeding or planning to become pregnant before using this treatment.
How does Flonase compare to Nasacort?
Answer:
Flonase and Nasacort are two brand-name corticosteroid nasal sprays used to reduce swelling caused by infections or allergies. They belong to the same class of medications known as nasal corticosteroids. There are some differences between the two. For example, Flonase contains the active ingredient fluticasone furoate, while Nasacort contains triamcinolone acetonide. But both sprays have been shown to be equally effective and safe for use[1], so the choice between them is ultimately for you and your clinician to decide on.
Treated trusted source:
Small, P., et al. (1997). A comparison of triamcinolone acetonide nasal aerosol spray and fluticasone propionate aqueous solution spray in the treatment of spring allergic rhinitis. Journal of Allergy and Clinical Immunology, 100(5), pp.592–595.
Last updated on Jan 20, 2026.
How we reviewed this page:
Our experts continually monitor new findings in health and medicine, and we update our articles when new info becomes available.
Jan 20, 2026
Published by: The Treated Content Team.Medically reviewed by: Dr. Joseph Palumbo, Senior Medical Adviser
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Dr. Joseph Palumbo
Senior Medical Adviser
Joseph joined Treated in 2023, and is one of the lead doctors providing prescribing services for the platform.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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