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

Summary

Common side effects of Allegra Allergy include: headache. Other side effects include: otitis media. Continue reading for a comprehensive list of adverse effects.

Applies to fexofenadine: oral capsules and tablets, oral fixed-combination tablets.

Side effects include:

Children 6–11 years of age receiving conventional tablets: Headache, upper respiratory tract infection, coughing, accidental injury, fever, pain, otitis media.

Adults and children ≥12 years of age receiving conventional capsules or tablets: Viral infection (e.g., cold, flu), nausea, dysmenorrhea, sinusitis, dizziness, drowsiness, dyspepsia, fatigue, headache, upper respiratory tract infection, back pain.

Fixed-combination fexofenadine (the active ingredient contained in Allegra Allergy) hydrochloride (60 mg)/pseudoephedrine hydrochloride (120 mg): Headache, insomnia, nausea, dry mouth, dyspepsia, throat irritation, dizziness, agitation, back pain, palpitation, nervousness, anxiety, upper respiratory tract infection, abdominal pain.

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]