Images for illustrative purposes only

How it works?

Online Consultation

We ask you to complete a quick and easy consultation and get you started.

Choose condition

We have a selection of treatments available for various conditions.

Express Delivery

You will have complete visibility and control of your delivery.
Notice!

Before ordering this treatment, you may have to complete an online consultation

Overview

When hayfever hits hard, it can feel impossible to get through the day. Telfast is a fast-acting, non-drowsy antihistamine that gives powerful relief from sneezing, itchy eyes, and congestion — without slowing you down. Trusted by millions worldwide, it helps you regain control, breathe easier, and enjoy life, even during peak pollen season.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.

 

What is Telfast


Telfast contains fexofenadine hydrochloride, a modern, non-sedating antihistamine designed to relieve the symptoms of hayfever (seasonal allergic rhinitis). Unlike older antihistamines, it doesn’t usually cause drowsiness, making it a good choice if you need to stay sharp for work, driving, or study.

Telfast works by blocking the effects of histamine — the chemical released in the body during an allergic reaction that causes sneezing, runny nose, itchy eyes, and congestion.

Directions

  • The usual adult dose for hayfever is 120mg once daily, or 180mg if other doses have proved ineffective.
  • Take the tablet with water before a meal.
  • Try to take it at the same time each day for consistent relief.
  • Do not take more than the prescribed dose.


Always follow the advice given by your prescriber.

Side Effects

Like all prescription medicines, this treatment can cause side effects, although not everyone will experience them. Most are mild, temporary, and improve as your body adjusts, but it’s important to be aware of them.

Common (may affect up to 1 in 10 people):

  • Headache – this is one of the most frequently reported side effects. It is usually mild to moderate and can often be managed by keeping well hydrated, resting, or using simple pain relief if appropriate.
  • Drowsiness (rare, but possible) – some people may feel unusually tired or sleepy. If this happens, avoid driving or operating machinery until you know how the medicine affects you.
  • Dizziness – you may occasionally feel light-headed, especially when standing up suddenly. Staying hydrated and rising slowly from a seated or lying position can help reduce this effect.
  • Nausea – a small number of people may feel sick after taking the medicine. Taking it with food or a light snack can sometimes help reduce nausea.


Uncommon (may affect up to 1 in 1000 people):

  • Insomnia – difficulty sleeping can occur in some patients. Good sleep habits, such as avoiding caffeine in the evening and keeping a regular bedtime routine, may help.
  • Nervousness – some individuals report feeling restless, anxious, or jittery. If this persists, it’s best to speak with your prescriber.
  • Dry mouth – this may be bothersome but is usually temporary. Sipping water regularly, chewing sugar-free gum, or using saliva substitutes can help relieve dryness.

 

Rare (seek medical advice if severe):

  • Allergic reaction – symptoms may include skin rash, itching, swelling (particularly of the face, lips, or throat), or difficulty breathing. This requires immediate medical attention. Stop taking the medicine and seek urgent help if you experience these symptoms.


Most people tolerate this treatment well, and side effects—if they occur—tend to be short-lived. If any side effect becomes bothersome, or you are worried about your symptoms, consult your doctor, pharmacist, or prescriber.

 

Disclaimer: This is not a complete list of side effects. For the full information, always read the patient information leaflet provided with your medicine. If you are concerned about side effects, seek medical advice. In an emergency, seek immediate medical assistance.

Warnings

Telfast may not be suitable if you:

  • Are allergic to fexofenadine or any of its ingredients
  • Have kidney or liver problems
  • Are pregnant or breastfeeding (only use if advised by your doctor)
  • Are taking certain medicines such as erythromycin or ketoconazole (may increase Telfast levels in the body)

FAQ's

How quickly does Telfast work?
Most people feel relief within one hour, with effects lasting all day.

Will Telfast make me sleepy?
Telfast is a non-drowsy antihistamine, but in rare cases, mild drowsiness may occur.

Can I take Telfast every day during hayfever season?
Yes, it’s safe for daily use when prescribed. Many people use it throughout pollen season.

Is Telfast stronger than other antihistamines?
It is often chosen for moderate to severe hayfever symptoms and may be more effective if standard antihistamines aren’t enough.

Can I drink alcohol while taking Telfast?
Alcohol may increase the chance of drowsiness in sensitive people, so moderation is advised.

Is Telfast available in different strengths?
Yes. In the UK, 120mg is commonly used for hayfever. Higher strengths (e.g. 180mg) are usually for hives/urticaria.