Compare Allegra vs. Flonase

Head-to-head comparisons of medication uses, side effects, ratings, and more.



Treats allergy symptoms. Allegra (Fexofenadine) relieves allergy symptoms without making you feel drowsy.Relieves allergy symptoms. Flonase (Fluticasone) is a good first-choice medicine for treating a runny or stuffy nose caused by allergies, and it's cheaper than some alternatives.
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Reviews & ratings
Button Group. All currently active
Button Group. All currently active
Reviews for Allegra (Fexofenadine)
of people say Allegra (Fexofenadine) is worth it
say it works well
say it's a big hassle
Reviews for Flonase (Fluticasone)
5% vs. Allegra (Fexofenadine)
16% vs. Allegra (Fexofenadine)
7% vs. Allegra (Fexofenadine)
Side effects
  • Vomiting 3%
  • Headache 3%
  • Cough 3%
  • Back pain 2%
  • Ear, nose, or throat infection 2%
  • Diarrhea 1%
  • Fever 1%
  • Runny nose 1%
  • Dizziness 1%
  • Stomach discomfort 1%
More Allegra side effects »
  • Asthma symptoms 4%
  • Nausea/vomiting 3%
  • Nosebleed 2%
  • Headache 1%
  • Cough 1%
  • Sore throat 1%
More Flonase side effects »
How it works
Allegra (Fexofenadine) is an antihistamine. It blocks histamine, a chemical that causes congestion, itching, and other allergic reactions.Flonase (Fluticasone) is a nasal steroid. It works directly in your nose to reduce swelling and inflammation caused by allergies.
Type of medication
2nd generation
Prescription or OTC
Prescription or OTC
Available as
  • Pill
  • Dissolving tablet
  • Liquid
  • Nasal spray
Used for (click to learn more)
Risk factors for serious side effects
  • Taking with alcohol
  • Taking other medicines that make you less alert
  • History of phenylketonuria (PKU)
Detailed Allegra (Fexofenadine) risks & warnings »
  • Switching from oral or injectable steroids to inhaled, especially if used long term
  • Using other inhaled steroids with Flonase (Fluticasone)
    • Long-term use
    • Taking more than recommended dose
    • Switching from oral or injectable steroids to inhaled, especially if used long term
    • Using other inhaled steroids with Flonase (Fluticasone)
    • Long-term use
    • Exposure to immunizable diseases (chickenpox and measles)
    • Exposure to tuberculosis
    • Surgery or trauma to the nose or sinuses
    • Long-term use
    Detailed Flonase (Fluticasone) risks & warnings »
    Pregnancy category
    No specific alcohol-related info.No specific alcohol-related info.
    No specific food-related info.No specific food-related info.
    Kidneys and liver
    • The dose needs to be adjusted for people with kidney problems.
    No specific kidneys and liver-related info.
    No specific sex-related info.No specific sex-related info.
    • Won't make you feel drowsy like some antihistamine medicines.
    No specific sleep-related info.
    No specific weight-related info.No specific weight-related info.
    Upsides and benefits
    • Relieves allergy symptoms, like sneezing, runny nose, and itching.
    • Approved to be used in kids and adults age 6 months and older.
    • Won't make you feel drowsy like some antihistamine medicines.
    • Available over-the-counter without a prescription.
    • Comes in many forms, such as a tablet, liquid, or quick-dissolving tablet.
    • It's okay to take with most other medications since it has very few interactions.
    • First-choice medication for treating runny and stuffy noses caused by allergies. It works by reducing inflammation in the nose.
    • Because it's used directly where the inflammation is happening, it has fewer side effects than oral steroids do and has a lower chance of causing withdrawal symptoms once the medication is stopped.
    • Can be used as needed to help control symptoms in people age 13 years or older.
    • Available as a generic medication.
    Downsides and risks
    • For some people, the effects Allegra (Fexofenadine) has on allergies will wear off over time.
    • May not work as well as the first-generation antihistamines, like diphenhydramine (Benadryl).
    • The dose needs to be adjusted for people with kidney problems.
    • Flonase (Fluticasone) doesn't have a counter on it, so it can be hard to remember how many sprays are left (each bottle has 120 sprays).
    • Needs to be primed (pressed/pumped until a fine spray appears) up to six times prior to using it for the first time, or if you haven't used it in 2 weeks.
    • Since the medicine in Flonase (Fluticasone) is a steroid, it can slow down your healing process if you've hurt your nose or had nose surgery.
    Tips from our pharmacists for people taking the medication
    • Starts working in 1 to 2 hours depending on what dosage form you're taking.
    • Works best when taken regularly, even before symptoms are expected to appear.
    • Can make you feel dizzy or sleepy, so you can take it at bedtime.
    • Follow age-specific dosing and don't take more than recommended.
    • If symptoms get worse or you need to use it for more than a few weeks, talk with your doctor.
    • It can take several days for Flonase (Fluticasone) to start working fully.
    • Don't take more of it than was prescribed for you.
    • Blow your nose before using Flonase (Fluticasone).
    • Can cause thrush (a fungal infection) inside the nose and throat.
    • Can also cause a headache, sore throat, or nosebleeds.
    Learn more
    More about AllegraSide effectsReviews & ratingsAlternativesFDA package insert
    More about FlonaseSide effectsReviews & ratingsAlternativesFDA package insert