What it is used for

Hay fever and other allergies affecting the nose and eyes
Hives (urticaria)

Read our guides:

Hay fever

Off-label uses

Doctors sometimes prescribe a medicine for a condition it is not officially licensed for. This is called off-label use. It is legal and common when there is good evidence it helps, and your doctor should explain why they are suggesting it.

Fexofenadine is not commonly used off-label.

How it works

Fexofenadine blocks histamine, a chemical the body releases during an allergic reaction. This reduces sneezing, a runny nose, itchy eyes and itchy skin.

Side effects

Like all medicines, Fexofenadine can cause side effects, although not everyone gets them. Many are mild and ease after the first few weeks.

Common side effects

headache
feeling dizzy
feeling sick
feeling tired

Tell your doctor or pharmacist if these bother you or do not go away.

Serious side effects

These are rare. Call 111 or contact your doctor straight away if you get:

a fast or irregular heartbeat

Call 999 if you have signs of a serious allergic reaction, such as swelling of your lips, mouth, throat or tongue, or trouble breathing.

You can report any side effect to the Yellow Card scheme, run by the medicines regulator.

Stopping and withdrawal

Important safety information

Do not take it with fruit juice, such as orange, apple or grapefruit juice, as this makes it work less well.
Leave 2 hours between it and indigestion remedies containing aluminium or magnesium.

Questions about your medicine?

A pharmacist can answer questions about your medicines for free, without an appointment. You can also ask your GP for a medication review. Check if you can get free prescriptions.