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Allegra Side Effects

Generic Name: fexofenadine

Note: This document contains side effect information about fexofenadine. Some of the dosage forms listed on this page may not apply to the brand name Allegra.

For the Consumer

Applies to fexofenadine: oral capsule, oral suspension, oral tablet, oral tablet disintegrating

Along with its needed effects, fexofenadine (the active ingredient contained in Allegra) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking fexofenadine:

Rare
  • Chest tightness
  • feeling of warmth, redness of the face, neck, arms and occasionally, upper chest
  • large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • shortness of breath, difficult or labored breathing

Some side effects of fexofenadine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common Less common
  • Back pain
  • body aches or pain
  • chills
  • coughing
  • diarrhea
  • difficulty with moving
  • dizziness
  • ear congestion
  • earache
  • fever
  • headache
  • joint pain
  • loss of voice
  • muscle aching or cramping
  • muscle pains or stiffness
  • nasal congestion
  • nausea
  • pain in arms or legs
  • pain or tenderness around eyes or cheekbones
  • painful menstrual bleeding
  • redness or swelling in ear
  • ringing or buzzing in ears
  • runny or stuffy nose
  • sleepiness or unusual drowsiness
  • sneezing
  • sore throat
  • stomach upset
  • swollen joints
  • unusual feeling of tiredness or weakness
  • viral infection (such as cold and flu)
Rare
  • Nervousness
  • rash
  • sleeplessness
  • terrifying dreams
  • trouble sleeping

For Healthcare Professionals

Applies to fexofenadine: oral capsule, oral suspension, oral tablet, oral tablet disintegrating

General

The most commonly reported side effects included headache, drowsiness, dizziness, and nausea.[Ref]

Gastrointestinal

Very common (10% or more): Vomiting (up to 12%)
Common (1% to 10%): Nausea, diarrhea, stomach discomfort[Ref]

Nervous system

Very common (10% or more): Headache (up to 10.3%)
Common (1% to 10%): Drowsiness, dizziness, somnolence[Ref]

Other

Common (1% to 10%): Otitis media, pyrexia, fatigue, extremity pain[Ref]

Respiratory

Common (1% to 10%): Cough, upper respiratory tract infection, rhinorrhea
Frequency not reported: Dyspnea[Ref]

Musculoskeletal

Common (1% to 10%): Back pain[Ref]

Genitourinary

Common (1% to 10%): Dysmenorrhea[Ref]

Psychiatric

Frequency not reported: Insomnia, nervousness, nightmares, sleep disorders or paroniria/excessive dreaming[Ref]

Cardiovascular

Frequency not reported: Palpitations, tachycardia, chest tightness[Ref]

Hypersensitivity

Frequency not reported: Hypersensitivity reactions, angioedema, systemic anaphylaxis[Ref]

Dermatologic

Frequency not reported: Rash, pruritus, flushing[Ref]

References

1. Cerner Multum, Inc. "Australian Product Information." O 0

2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

3. "Product Information. Allegra (fexofenadine)." Hoechst Marion-Roussel Inc, Kansas City, MO.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

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