Allegra 180

Tablet · Sanofi
USUALLY SOLD WITHOUT PRESCRIPTION

Allegra 180 is a tablet made by Sanofi that contains Fexofenadine 180 mg. Fexofenadine is a antihistamine (non-drowsy): relieves seasonal allergies (sneezing, runny nose, itchy eyes) and hives.

Ingredient (salt)Amount
Fexofenadine180 mg

What it is used for

Relieves seasonal allergies (sneezing, runny nose, itchy eyes) and hives.

How it works

A non-drowsy antihistamine that does not enter the brain much, so it rarely causes sleepiness.

How to take it

Adults: 120 mg once a day for hay fever, 180 mg for hives. Take with water, not fruit juice, and not within 2 hours of an antacid.

Common side effects

  • Headache
  • Nausea
  • Dizziness

Get medical help straight away if

Allergic reaction

Be careful

Do not take with fruit juices or antacids close together; they reduce its effect.

Other medicines and interactions

Fruit juices (apple, orange, grapefruit) and aluminium or magnesium antacids reduce how much is absorbed.

Pregnancy and breastfeeding

Ask a doctor; cetirizine or loratadine are more often chosen in pregnancy. Considered acceptable while breastfeeding.

Same composition, other brands (4)

Histafree-180Fexova 180Fexy 180Fex-180

Ask your doctor or pharmacist before switching brands.

Same ingredients, different strength or form

Allegra 120Fexofen-120Histafree-120Fexoder-120Odifex 120Altiva 120Fexova 120Fexy 120

Common questions

What is Allegra 180?

Allegra 180 is a tablet by Sanofi containing Fexofenadine 180 mg.

What is Allegra 180 used for?

Relieves seasonal allergies (sneezing, runny nose, itchy eyes) and hives.

How should I take Allegra 180?

Adults: 120 mg once a day for hay fever, 180 mg for hives. Take with water, not fruit juice, and not within 2 hours of an antacid. Always follow the dose your doctor or the pack gives.

What are the side effects of Allegra 180?

Common side effects include: Headache, nausea, dizziness. Get medical help straight away for: Allergic reaction.

Does Allegra 180 need a prescription?

It is usually sold without a prescription in India, but ask a pharmacist if you take other medicines or have a long-term illness.

Can I take Allegra 180 in pregnancy or while breastfeeding?

Ask a doctor; cetirizine or loratadine are more often chosen in pregnancy. Considered acceptable while breastfeeding.

What are the substitutes for Allegra 180?

Brands with the same composition: Histafree-180, Fexova 180, Fexy 180, Fex-180. Ask your doctor or pharmacist before switching.

Sources and further reading

NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.

Composition checked against pack details from large Indian online pharmacies. Last reviewed 31 October 2026. Written by Satya Babu.

🔎 Search another medicine

For information only, not medical advice. This page is a plain-language summary written from standard prescribing information and the public guides linked below. Brands sometimes change their formula, so always check the composition printed on the pack. Doses here are typical adult doses; yours may differ. Do not start, stop or change a medicine without your doctor or pharmacist, and keep all medicines away from children. In an emergency, call 112 (India) or your local emergency number.