What it is used for
- Hay fever (allergic rhinitis)
- Sneezing, runny nose, itchy or watery eyes
- Chronic hives (urticaria) and itching
- Allergy symptoms from pollen, dust, or animals
How it works
Fexofenadine blocks histamine, the chemical released during allergic reactions, reducing symptoms such as sneezing, itching, and watering without usually causing drowsiness.
How it is taken
Comes as tablets and, in some places, a liquid. It is taken by mouth. It is often recommended to take it with water rather than fruit juice. Follow your doctor's, pharmacist's, or the label's instructions exactly, and do not exceed the recommended amount.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Headache
- Drowsiness (uncommon)
- Dizziness
- Nausea
- Dry mouth
Serious effects — get help
- Signs of a severe allergic reaction (facial or throat swelling, difficulty breathing)
- Fast or irregular heartbeat
- Chest tightness
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Antacids containing aluminium or magnesium (can reduce absorption if taken close together)
- Fruit juices such as apple, orange, or grapefruit (may lower how much is absorbed)
- Other sedating medicines
- Certain medicines affecting the heart rhythm
Who should take care
- Tell your clinician if you are pregnant, planning pregnancy, or breastfeeding
- Caution with kidney problems
- Avoid if allergic to fexofenadine
- Take with water and separate from fruit juice or antacids as advised