Compare Allegra vs. Sudafed

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

Allegra (fexofenadine)

Over-the-counter

Sudafed (Pseudoephedrine)

Prescription or OTC
Treats allergy symptoms.

Allegra (fexofenadine) relieves allergy symptoms without making you feel drowsy.

3.9/ 5 average rating with 24 reviewsforAllegra
Clears your sinuses.

Sudafed (Pseudoephedrine) relieves stuffy nose, but it could keep you up at night. Don't forget your photo ID or you won't be able to buy it in the drugstore.

3.9/ 5 average rating with 1740 reviewsforSudafed
Upsides
  • Allegra (fexofenadine) is effective at reducing symptoms for seasonal allergies and chronic hives without significant drowsiness, unlike Benadryl.
  • Approved for kids aged 6 months or older.
  • Allegra (fexofenadine) comes in many forms, like tablet, liquid, and quick-dissolving tablet.
  • One of the best over-the-counter options to clear stuffy nose and help you breathe better.
  • Clears nasal congestion better than other decongestants like phenylephrine.
  • Can be helpful in relieving congestion-related headaches and pressure in your ears.
  • Available in regular and extended release forms.
Downsides
  • Allegra (fexofenadine)'s effectiveness can wear off over time.
  • The dose needs to be adjusted for people with kidney problems.
  • Pseudoephedrine (a decongestant) can make your heart race or make you feel anxious and restless.
  • It can affect the quality of your sleep, so you can't take it too close to going to bed.
  • Can raise blood pressure so check with your doctor before using it if you have high blood pressure or other heart conditions.
  • Sudafed (Pseudoephedrine) isn't as effective after using it for more than 4 days straight.
  • Need to show a photo ID to buy it in the drugstore and there is a limit on how much you can buy each visit.
Used for
Dosage forms
  • Pill
  • Dissolving tablet
  • Liquid
  • Pill
  • Extended release
  • Liquid
No pricing information available
No pricing information available
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Reviews
24 reviews so far
79%
saidit'sworth it
63%
saiditworked well
0%
saidit'sa big hassle

Have you used Allegra (fexofenadine)?

Leave a review
1740 reviews so far
82%
saidit'sworth it
45%
saiditworked well
6%
saidit'sa big hassle

Have you used Sudafed (Pseudoephedrine)?

Leave a review
Side effects
4possible side effects
  • Dizziness
    2%
  • Back Pain
    2%
  • Stomach discomfort
    2%
  • Pain in hands/feet
    2%
See more detailed side effects
The Sudafed (Pseudoephedrine) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Driving impairment
    • Taking with alcohol
    • Taking other medicines that make you less alert
  • Brain damage from too much phenylalanine
    • History of phenylketonuria (PKU)
See more detailed risks and warnings
  • High blood pressure
    • History of high blood pressure
  • Heart problems
    • History of heart problems
    • Age 65 years or older
  • Seizures
    • History of seizures
  • Harm to fetus
    • Women of childbearing age
See more detailed risks and warnings