Compare Allegra vs. Phenylephrine
Head-to-head comparisons of medication uses, side effects, ratings, and more.
Allegra (fexofenadine) relieves allergy symptoms without making you feel drowsy.
Sudafed Pe (Phenylephrine) is a good medication for relieving stuffy nose. It doesn't work as well as pseudoephedrine (Sudafed), but it has fewer side effects.
- 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.
- Works to clear nasal congestion and helps you breathe better.
- Helpful in relieving congestion-related headaches.
- Has fewer side effects than other decongestants like pseudoephedrine.
- It doesn't raise your blood pressure and heart rate as much, or cause as much trouble falling asleep.
- Doesn't give you rebound congestion (worse symptoms when you stop taking it) like nasal spray decongestants do.
- Allegra (fexofenadine)'s effectiveness can wear off over time.
- The dose needs to be adjusted for people with kidney problems.
- Phenylephrine doesn't last as long as other decongestants like pseudoephedrine (Sudafed).
- You shouldn't use it if you have high blood pressure.
- Can make your heart race or make you feel anxious and restless.
- Shouldn't use it before you want to sleep.
- Not as effective after using it for 4 days in a row.
- Dissolving tablet
- Nasal spray
- Eye drops
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- Back Pain2%
- Stomach discomfort2%
- Pain in hands/feet2%
- Driving impairment
- Taking with alcohol
- Taking other medicines that make you less alert
- Brain damage from too much phenylalanine
- History of phenylketonuria (PKU)
- High blood pressure
- History of high blood pressure
- Taking MAO inhibitors
- Heart problems
- History of heart problems
- Age 65 years or older
- Harm to fetus
- Women of childbearing age