• Fast-acting relief for sneezing and itchy eyes
  • Non-drowsy formula lets you stay alert
  • Provides 24-hour protection with one daily tablet

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)
Frequently asked questions

  • What is Telfast and what is it used for?

    Telfast is a branded form of fexofenadine used to treat hay fever and other allergic conditions. It helps reduce sneezing, itchy eyes, runny nose and congestion. Many people choose Telfast for stronger or more persistent seasonal allergies that don’t respond well to standard antihistamines.

  • How does Telfast relieve hay fever symptoms?

    Telfast works by blocking histamine, which is responsible for allergy symptoms like sneezing, itching and watery eyes. This helps calm your immune response during high-pollen periods and reduces irritation throughout the day.

  • How quickly does Telfast start working?

    Most people find Telfast starts working within one hour, with steady relief continuing throughout the day. It works best when taken daily during the allergy season rather than only when symptoms appear.

  • Is Telfast stronger or more effective than standard antihistamines?

    Telfast is often chosen when symptoms remain strong despite cetirizine or loratadine. It is classed as a newer, non-drowsy antihistamine and may give better relief for persistent hay fever or more intense allergy symptoms.

  • Can I take Telfast if I have asthma or eczema as well as allergies?

    Yes. Many people with asthma or eczema also use Telfast during pollen season. It helps control the allergic triggers that can worsen these conditions. Speak to a clinician if asthma symptoms increase or breathing becomes harder during high-pollen days.

  • Who should avoid using Telfast?

    Telfast may not be suitable if you take certain indigestion medicines, have kidney issues or use other antihistamines. It is also not recommended for children under 12 without clinical guidance. Check with a pharmacist if you take regular medicines.

  • Can I take Telfast with my usual hay fever medicines?

    Yes. Many people combine Telfast with nasal sprays or eye drops, especially during peak pollen days. Avoid taking it with other antihistamines unless advised by a clinician, as this may increase side effects.

  • Why is Telfast sometimes recommended when other antihistamines haven’t worked?

    Telfast is often used when cetirizine or loratadine haven’t provided enough relief. It blocks histamine more selectively, making it helpful for people with stronger symptoms or allergies that flare up repeatedly during pollen season.

  • Can Telfast help with pet allergies or dust allergies?

    Yes. Telfast can reduce symptoms triggered by pet dander or dust mites, including sneezing, itchy eyes and congestion. It may be especially helpful if you have year-round allergies that flare during pollen season.

  • Is Telfast suitable for people with chronic sinus issues?

    Many people with sinus congestion or recurrent sinusitis find Telfast helpful, as it reduces inflammation linked to allergic triggers. You may still need nasal sprays or saline rinses alongside it if congestion is persistent.

  • Can I take Telfast every day during pollen season?

    Yes. Daily use of Telfast is common and helps keep symptoms under control through spring and summer. Consistent dosing prevents histamine building up in your system, giving steadier relief.

  • Does Telfast cause fewer side effects than older antihistamines?

    Yes. Telfast is less likely to cause drowsiness than older antihistamines such as chlorphenamine. Most people stay fully alert, although a small number may feel slightly tired.

  • Can I take Telfast with decongestants or eye drops?

    Yes. Nasal decongestants, steroid sprays and anti-allergy eye drops are often used with Telfast during peak allergy periods. Always avoid taking more than one antihistamine unless advised.

  • What should I do if Telfast makes me feel tired?

    Although rare, some people may feel slightly tired when starting Telfast. This usually eases within a few days. If it continues, try taking it in the evening or discuss switching to another antihistamine with a clinician.

  • Is Telfast safe for long-term seasonal use?

    Yes. Telfast is safe to use throughout your allergy season and many people take it daily for months each year. If symptoms persist outside pollen season, speak to a clinician to review your allergy plan.