Allegra: What is it for and how to take it

Allegra is an antihistamine remedy used to treat allergies with the active ingredient of fexofenadine hydrochloride. After ingestion, the effect of the medication starts within 1 hour and has maximum action within 2 or 3 hours, extending for 12 hours.

Allegra is sold as tablets and is produced by the Sanofi-Aventis laboratory. The price varies between 15 and 42 reais, depending on the dosage.


Allegra is indicated to treat allergic reactions, such as allergic rhinitis and hives.

How to use 

How to use Allegra can be:

  • Allergic rhinitis: in adults and children over 12 years of age, one 60 mg tablet may be taken twice a day, or one 120 mg or 180 mg tablet may be taken once a day .
  • Urticaria : in adults and children over 12 years of age, 1 tablet of 180 mg may be taken once a day.

The dosage and ingestion of the medicine should be indicated by an allergy specialist.

Side effects

Side effects of Allegra can be headache, drowsiness, dizziness, nausea, difficulty breathing and redness.


Allegra is contraindicated in patients who are hypersensitive to any component of the formula, and for children under 12 years of age. 

Use in pregnancy and breastfeeding should be avoided and ingestion of this medication should be according to the doctor’s indication.

Leave a Comment