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Allegra Oral

Generic Name: FEXOFENADINE - ORAL
Pronounced: (fex-oh-FEN-uh-deen)

Allegra Oral Side Effects

Stomach upset, menstrual cramps, back pain, cough, fever, stuffy nose, earache or dizziness may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

This medication does not usually cause drowsiness when used at recommended doses and under normal circumstances. However, this drug may make you dizzy; therefore use caution engaging in activities that require alertness such as driving or using machinery.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Allegra Oral Precautions

Before taking fexofenadine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

  • kidney disease


Limit alcoholic beverages, as it may intensify drug side effects. (See also Side Effects.)

The rapidly dissolving tablet may contain aspartame. If you have phenylketonuria (PKU) or any other condition that requires you to restrict your intake of aspartame (or phenylalanine), consult your doctor or pharmacist about using this drug safely.

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