Compare Allegra vs. Zyrtec D

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

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Treats allergy symptoms.

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

3.9/ 5 average rating with 24 reviewsforAllegra
Relieves congestion and allergy symptoms.

Zyrtec D (Cetirizine / Pseudoephedrine) relieves allergies and congestion without causing daytime sleepiness. It can keep you up at night if you take it too close to bedtime.

3.7/ 5 average rating with 927 reviewsforZyrtec D
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.
  • The antihistamine (Cetirizine) in Zyrtec D (Cetirizine / Pseudoephedrine) causes less drowsiness than other medications like Benadryl.
  • The decongestant (Pseudoephedrine) in Zyrtec D (Cetirizine / Pseudoephedrine) is stronger than other decongestants. It can also help relieve congestion-related headaches and ear pressure.
  • The stimulant effects of Pseudoephedrine can give you some extra energy during the day.
  • Doesn't give you rebound congestion (worse congestion symptoms after you stop taking the medicine) like decongestant nose sprays can.
  • It's available without a prescription, unlike other strong allergy medicines.
Downsides
  • Allegra (fexofenadine)'s effectiveness can wear off over time.
  • The dose needs to be adjusted for people with kidney problems.
  • You can have more side effects when using combination pills than when using single-ingredient medications.
  • The antihistamine (Cetirizine) can cause more drowsiness than similar antihistamines, like Allegra D (which contains Fexofenadine) and Claritin D (which contains Loratadine).
  • The decongestant (Pseudoephedrine) can make your heart race or give you anxious or restless feelings.
  • You might not sleep as well due to Pseudoephedrine's effects and you can also have strange dreams while taking it.
  • Pseudoephedrine can raise your blood pressure, so don't take it if you have high blood pressure or other heart conditions.
  • Although you don't need a prescription, you do need to show a photo ID to buy this from behind the pharmacy counter.
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Used for
Dosage forms
  • Pill
  • Dissolving tablet
  • Liquid
  • Extended release
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
927 reviews so far
75%
saidit'sworth it
43%
saiditworked well
9%
saidit'sa big hassle

Have you used Zyrtec D (Cetirizine / 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 Zyrtec D (Cetirizine / 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 or older
  • Seizure
    • History of seizure
  • Harm to fetus
    • Women of childbearing age
  • Taking the wrong medication
  • Increased side effects
    • Age 65 years or older
  • Driving impairment
    • Taking with alcohol
    • Taking other medicines that make you less alert
  • Overdosage
    • Current kidney disease
    • Current liver disease
See more detailed risks and warnings