Flonase vs. Clarinex

See how Flonase and Clarinex compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Flonase is an over-the-counter nasal spray that reduces inflammation to relieve congestion, sneezing, and runny nose, while Clarinex is a prescription pill that blocks histamine to relieve sneezing, itching, and hives.

  • Flonase typically costs far less per month than Clarinex and is also approved for nonallergic rhinitis, a use Clarinex does not have.

  • Clarinex is approved for chronic idiopathic urticaria and comes in pediatric-friendly forms starting at 6 months, options Flonase does not offer.

Flonase vs. Clarinex Drug Summary

Flonase

Flonase is a nasal corticosteroid used to relieve sneezing, congestion, and runny nose caused by seasonal and perennial allergic rhinitis, as well as nonallergic rhinitis. It's sprayed into each nostril once or twice daily and works by reducing inflammation in the nasal lining.

Clarinex

Clarinex is an oral antihistamine used to relieve nasal and non-nasal allergy symptoms like sneezing, itching, and runny nose from seasonal and perennial allergic rhinitis. It's taken once daily as a tablet, dissolving tablet, or liquid, and is also approved for chronic hives.

Flonase vs. Clarinex Side Effects

Flonase

Most common
Headache (up to 16.1%)
Pharyngitis (up to 7.8%)
Epistaxis (up to 6.9%)
Cough (up to 3.8%)

Clarinex

Most common
Pharyngitis (up to 4.1%)
Dry mouth (up to 3.0%)
Myalgia (up to 2.1%)
Fatigue (up to 2.1%)

Flonase vs. Clarinex Dosage

Flonase

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 200 mcg once daily At the start
Maximum dose 100 mcg once daily If needed
Dose changes 1 increase As tolerated

Clarinex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 1 mg once daily At the start
Maximum dose 5 mg once daily If needed
Dose changes 3 increases As tolerated

Flonase vs. Clarinex Indications

Flonase

Flonase treats the nasal symptoms of both allergic and nonallergic rhinitis, including congestion, sneezing, and runny nose. It's approved for adults and children 4 years and older and works by calming inflammation directly in the nasal tissue.

  • Seasonal allergic rhinitis (ages 4+)

  • Perennial allergic rhinitis (ages 4+)

  • Nonallergic rhinitis (ages 4+)

Clarinex

Clarinex relieves both nasal and non-nasal allergy symptoms, such as sneezing, itching, and watery eyes, as well as itching and hives from chronic urticaria. It's approved for a wider pediatric age range than Flonase, down to 6 months for some uses.

  • Seasonal allergic rhinitis (ages 2+)

  • Perennial allergic rhinitis (ages 6 months+)

  • Chronic idiopathic urticaria (ages 6 months+)

Flonase vs. Clarinex Pros and Cons

Flonase

Flonase is a corticosteroid nasal spray that treats the full range of allergy symptoms, including congestion, by reducing inflammation directly in the nasal passages. It's sold over-the-counter, making it accessible without a prescription, and typically costs much less per month than Clarinex.

Pros

  • Available over-the-counter, no prescription needed

  • Directly reduces nasal congestion via anti-inflammatory action

  • Once-daily dosing option for maintenance therapy

  • Roughly $20 to $95 per month, well below Clarinex's list price

Cons

  • Requires nasal spray technique, less convenient than a pill

  • Can cause nosebleeds or nasal irritation with regular use

  • May take several days to reach full effect

  • Not approved for children under 4 years old

Clarinex

Clarinex is a once-daily oral antihistamine that relieves sneezing, itching, and hives by blocking histamine rather than treating nasal inflammation directly. It's prescription-only and typically costs several times more per month than Flonase's over-the-counter price.

Pros

  • Oral tablet, easier for some than a nasal spray

  • Multiple formulations for pediatric dosing flexibility

  • Fast-acting relief from a once-daily pill

  • Also approved to treat chronic idiopathic urticaria (hives)

Cons

  • Roughly $270 to $300 per month, far above Flonase's list price

  • Doesn't reduce nasal inflammation the way a steroid spray does

  • Generally less effective for nasal congestion than nasal steroids

  • Available by prescription only, no OTC option

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