Flonase (fluticasone propionate) and Nasacort (triamcinolone acetonide) are over-the-counter steroid nasal sprays that work in the same way and relieve allergy symptoms about equally well. The practical differences: Flonase is also labeled for itchy, watery eyes; Nasacort is approved from age 2 rather than 4; and Nasacort is unscented, which some people prefer.
- Both are glucocorticoid (steroid) sprays used once a day for hay fever and year-round allergies. They reduce nasal congestion, runny nose, sneezing and itchy nose.
- Flonase Allergy Relief: fluticasone propionate 50 mcg per spray, ages 4 and up. Its label also covers itchy, watery eyes.
- Nasacort Allergy 24HR: triamcinolone acetonide 55 mcg per spray, ages 2 and up. It is fragrance-free and alcohol-free.
- How fast: some relief on day 1, full effect after several days of daily use. These sprays work best used every day, not just on bad days.
- Side effects: nosebleeds, nasal dryness or irritation, headache and sore throat. In children, long-term use can slightly slow growth, so use the lowest dose for the shortest time.
This is general information, not medical advice. See a doctor if symptoms last longer than the label allows, if you get frequent nosebleeds, or if you have facial pain, fever or vision changes.
Flonase vs Nasacort at a glance
| Flonase Allergy Relief | Nasacort Allergy 24HR | |
|---|---|---|
| Active ingredient | Fluticasone propionate 50 mcg/spray | Triamcinolone acetonide 55 mcg/spray |
| Made by | Haleon | Sanofi (Opella) |
| OTC since | 2014 | 2013 |
| Ages | 4 and older | 2 and older |
| Adult dose | 2 sprays per nostril once daily for week 1, then 1 to 2 sprays | 2 sprays per nostril once daily, then 1 spray once symptoms improve |
| Child dose | 1 spray per nostril daily (ages 4 to 11) | 1 spray per nostril daily (ages 2 to 5; 6 to 11 can use up to 2) |
| Eye symptoms on label | Yes (itchy, watery eyes) | No |
| Scent | Light floral scent | Unscented |
| Generic available | Yes (fluticasone propionate) | Yes (triamcinolone acetonide) |
How steroid nasal sprays work
Allergic rhinitis happens when the immune system overreacts to pollen, dust mites, pet dander or mold. Cells in the nose release histamine and other chemicals, causing swelling, mucus and itching.
Nasal steroids calm that inflammation directly in the lining of the nose. Unlike antihistamine pills, which block one chemical (histamine), steroid sprays dampen several inflammatory pathways at once. That’s why guidelines from allergy organizations name intranasal corticosteroids as the most effective single treatment for moderate to severe allergic rhinitis, especially when nasal congestion is the main problem.
Very little of the drug reaches the bloodstream at normal doses, particularly with fluticasone, so whole-body steroid side effects are uncommon.
Does one work better?
Head-to-head studies and reviews have found no consistent difference in effectiveness between fluticasone propionate and triamcinolone for nasal symptoms. Both reduce congestion, runny nose, sneezing and itching more than placebo and more than oral antihistamines alone.
Flonase’s label includes relief of itchy, watery eyes, reflecting studies showing steroid sprays can ease eye symptoms through a nose-eye reflex. Nasacort may help eye symptoms in practice too, but that isn’t on its US label. If eye itching is your main complaint, antihistamine eye drops such as olopatadine (Pataday) or ketotifen (Zaditor) are more targeted.
The bigger factor is usually technique and consistency. Spraying correctly and using it every day matters more than which brand you choose.
Dosing
Flonase
- Adults and children 12+: week 1, 2 sprays in each nostril once daily. From week 2, 1 to 2 sprays in each nostril once daily as needed. After 6 months of daily use, ask your doctor whether to continue.
- Children 4 to 11: 1 spray in each nostril once daily, supervised by an adult. Talk to a doctor if needed for more than 2 months a year.
- Under 4: don’t use.
Nasacort
- Adults and children 12+: 2 sprays in each nostril once daily. Once symptoms are controlled, reduce to 1 spray in each nostril once daily.
- Children 6 to 11: 1 spray in each nostril once daily, increasing to 2 if needed, then back to 1 once controlled.
- Children 2 to 5: 1 spray in each nostril once daily.
- Under 2: don’t use.
Children should use these sprays for the shortest time needed. If a child needs them for more than 2 months a year, check in with their doctor.
How to use a nasal spray properly
1. Blow your nose gently.
2. Shake the bottle and prime it if it’s new or hasn’t been used for a while.
3. Tilt your head slightly forward, not back.
4. Put the nozzle just inside one nostril and close the other with a finger.
5. Aim the spray toward the outer side of your nostril, away from the middle (septum). This reduces nosebleeds.
6. Breathe in gently while spraying; don’t sniff hard.
7. Repeat on the other side, then wipe the nozzle.
Side effects
Both sprays have similar side effects:
- nosebleeds or blood-tinged mucus
- dryness, stinging or irritation in the nose
- headache
- sore throat or cough
- sneezing right after spraying
Less common or serious effects include:
- nasal septum perforation (a hole in the wall between the nostrils), usually linked to poor technique over time
- slower growth in children with prolonged use
- eye problems: steroid sprays may slightly raise the risk of glaucoma or cataracts with long-term use; tell your doctor if you have either
- thrush (yeast infection) in the nose or throat
- slow wound healing after nose injury or surgery
Stop and see a doctor if you have severe or frequent nosebleeds, a whistling sound when breathing through your nose, white patches in your nose or throat, or vision changes.
Interactions and cautions
- Ritonavir and cobicistat (HIV medicines) and strong CYP3A4 inhibitors such as ketoconazole can raise fluticasone levels and cause steroid side effects. Fluticasone’s label tells people taking these to ask a doctor first. This interaction is less pronounced with triamcinolone, but check with a pharmacist either way.
- Other steroids: if you already use a steroid inhaler for asthma or take steroid tablets, ask your doctor before adding a steroid nasal spray.
- Pregnancy: budesonide (Rhinocort) has the most pregnancy data, but many doctors consider fluticasone and triamcinolone acceptable too. Ask your doctor.
Flonase vs Nasacort vs other sprays
| Spray | Active ingredient | Ages (OTC) | Notes |
|---|---|---|---|
| Flonase Allergy Relief | Fluticasone propionate | 4+ | Labeled for eye symptoms |
| Flonase Sensimist | Fluticasone furoate | 2+ | Fine, scent-free mist |
| Nasacort Allergy 24HR | Triamcinolone acetonide | 2+ | Unscented, alcohol-free |
| Nasonex 24HR Allergy | Mometasone furoate | 2+ | OTC since 2022 |
| Rhinocort Allergy | Budesonide | 6+ | Most pregnancy data |
| Azelastine (Astepro) | Antihistamine spray | 6+ | Works within minutes |
Combination sprays containing both a steroid and an antihistamine (such as azelastine with fluticasone) are available by prescription for people whose symptoms aren’t controlled by one spray.
Which should you choose?
| Your situation | A reasonable pick |
|---|---|
| Child aged 2 or 3 | Nasacort (Flonase starts at 4) |
| Itchy, watery eyes as well as a stuffy nose | Flonase |
| Sensitive to scents | Nasacort or Flonase Sensimist |
| Cost is the main concern | Store-brand generic of either |
| Neither has worked | Try correct technique for 2 weeks, then ask about a different steroid or a combination spray |
Frequently asked questions
Which is better, Flonase or Nasacort?
Neither is clearly better. Studies show they relieve nasal allergy symptoms about equally. Flonase is also labeled for itchy, watery eyes; Nasacort is approved from age 2 and is unscented.
How long does it take Flonase or Nasacort to work?
Some people feel relief on the first day, but the full effect usually takes several days of daily use. They work best used every day during allergy season.
Can I use Flonase and Nasacort together?
No. They are both steroid sprays, so using them together doubles the steroid dose without extra benefit. Pick one.
Can children use Flonase or Nasacort?
Yes. Nasacort is approved for children 2 and older, Flonase for children 4 and older, with adult supervision and one spray per nostril daily. Use the shortest time needed, as long-term use can slightly slow growth.
Do steroid nasal sprays cause nosebleeds?
They can. Aiming the spray toward the outer wall of the nostril, away from the septum, reduces the risk. Stop and see a doctor if nosebleeds are frequent or heavy.
Is it safe to use Flonase or Nasacort every day?
Yes, they’re designed for daily use. Adults using them for more than 6 months, or children for more than 2 months a year, should check with a doctor.
References
- DailyMed. FLONASE ALLERGY RELIEF (fluticasone propionate) Drug Facts
- DailyMed. NASACORT ALLERGY 24HR (triamcinolone acetonide) Drug Facts
- Dykewicz MS, et al. Rhinitis 2020: a practice parameter update. J Allergy Clin Immunol. 2020;146:721-767
- MedlinePlus. Hay fever
- Nevada Medicaid. Therapeutic class overview: intranasal corticosteroids
About this article
Written by the Health Linear Editorial Team from primary sources such as FDA prescribing information, DailyMed, NIH and peer-reviewed studies, which are linked in the article. Last updated October 30, 2026.
Read our editorial process and medical disclaimer. Spotted an error? Tell us and we will correct it.
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