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Fexofenadine is an antihistamine medication used to treat allergic rhinitis. Allergic rhinitis is caused when the body is exposed to an allergen, such as pollen, flakes of skin from animals or dust mites. Symptoms can include itchy eyes, runny nose and sneezing.
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What is fexofenadine hydrochloride?

Fexofenadine Hydrochloride 120mg is the generic version of Telfast tablets. The active ingredient in both of these medications is is fexofenadine hydrochloride, an antihistamine. Fexofenadine is used to relieve hay fever symptoms such as sneezing, a runny and blocked nose, or itchy and red eyes. Fexofenadine is a much stronger alternative to cetirizine, an over the counter hay fever tablet.

How does fexofenadine work?

Fexofenadine, like other antihistamine tablets, works by blocking the effects of histamine, a substance in the body that causes allergy symptoms. While fexofenadine relieves hay fever symptoms, it does not cure hay fever.

How do you take fexofenadine?

Take one tablet daily for seasonal hay fever.


If you take indigestion remedies, you should leave 2 hours between the time that you take fexofenadine and the time you take your indigestion remedy. This is because indigestion remedies containing aluminium and magnesium may affect the absorption of fexofenadine, thus decreasing its effectiveness.

How effective is fexofenadine?

Fexofenadine is an effective way of treating hay fever. Fexofenadine is one of the most frequently used hay fever medications in the UK. One tablet a day should typically relieve hay fever symptoms for 24 hours.

What are the most common side effects of Fexofenadine Hydrochloride 120 mg?

The most common side effects of Fexofenadine Hydrochloride 120 mg are:

  • Headache
  • Drowsiness
  • Dizziness
  • Nausea

For rare side effects, see the patient information leaflet.

More Information
Dosage 120mg
Dosage Instructions Take ONE tablet DAILY Do not take indigestion remedies 2 hours before or after you take this medicine.