1. Will Fexofenadine make me drowsy?
It is designed to be non-drowsy, but a small number of people may feel tired or dizzy. Avoid driving if this happens.
What is Fexofenadine?
Fexofenadine is a non-drowsy antihistamine used to relieve hayfever and allergy symptoms. It works by blocking histamine, a chemical your body releases when it reacts to allergens such as pollen, dust, or pet dander.
It can help with:
- Sneezing
- Itchy, runny, or blocked nose
- Itchy, red, or watery eyes
Active ingredient: Fexofenadine hydrochloride 120mg
Who is Fexofenadine suitable for?
Fexofenadine is safe for use in::
- Adults and children aged 12 years and over
Speak to a doctor or pharmacist before taking it if you:
- Have kidney, liver, or heart problems
- Are pregnant or breastfeeding
- Take antacids
- Regularly drink grapefruit, orange, or apple juice
- Are taking other medicines
How to take Fexofenadine
- Take ONE tablet ONCE daily
- Swallow the tablet whole with water
- Do not exceed 1 tablet in 24 hours
Important tips:
- Do not take with fruit juice such as grapefruit, orange, or apple juice, as this can reduce how well the medicine works.
- Relief usually starts within about 1 hour.
How to store Fexofenadine tablets
- Store at room temperature
- Keep in the original packaging
- Protect from moisture and heat
- Keep out of sight and reach of children
- Do not use after the expiry date
Common side effects may include:
- Headache
- Drowsiness
- Nausea
- Dizziness
If you experience severe symptoms or signs of an allergic reaction such as swelling of the face, lips, or throat, seek medical attention immediately.
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Frequently Asked Questions
2. Can I take Fexofenadine with food or other medicines?
Yes, but it should be taken with water. Avoid fruit juices and take antacids containing aluminium or magnesium at least 2 hours apart.
3. Can I use Fexofenadine with a nasal spray or eye drops?
Yes. It is often used alongside steroid nasal sprays or allergy eye drops for better symptom control.
4. What should I do if I miss a dose?
Skip the missed dose and take your next tablet at the usual time. Do not take two tablets together.
5. Is Fexofenadine the same as Telfast?
Yes. Telfast is a brand name for the same medicine. Generic fexofenadine contains the same active ingredient and works in the same way.
Our Clinical Authors
Written by
Omar El-Gohary
CEO & Superintendent Pharmacist | GPhC Registration: 2059792
Medically reviewed by
Jabbar Ali
MPharm Clinical Lead | GPhC Registration: 2205490
This page has been written by a registered UK pharmacist and reviewed by our clinical team to ensure it is accurate, clear and reflects current clinical guidance.
Last medically reviewed: 20 August 2026
Last updated: 21 August 2026