Question 1

How quickly does Telfast start working for hay fever symptoms?

Accepted Answer

Telfast begins to relieve hay fever symptoms within 1 hour of taking the tablet. According to the NHS guidelines on fexofenadine, maximum effect is typically reached within 2-3 hours, with full 24-hour coverage from a single dose.

Question 2

Is Telfast truly non-drowsy compared to other antihistamines?

Accepted Answer

Yes, Telfast is classified as a second-generation non-sedating antihistamine. Unlike first-generation antihistamines like chlorphenamine, fexofenadine has minimal penetration of the blood-brain barrier, reducing central nervous system effects. However, individual responses vary, and some people may still experience drowsiness.

Question 3

Can I take Telfast with other allergy medications like Beconase nasal spray?

Accepted Answer

Yes, Telfast can be safely combined with intranasal corticosteroids like Beconase (beclometasone). This combination approach is often recommended in allergy management guidelines: Telfast for systemic symptoms and nasal spray for local nasal inflammation. Always inform your healthcare provider of all medications you're taking.

Question 4

Why should I avoid taking Telfast with fruit juice?

Accepted Answer

Fruit juices (especially apple, orange, and grapefruit) contain organic anion transporters that can reduce fexofenadine absorption by up to 60%. For optimal effectiveness, take Telfast with plain water and avoid fruit juices for 4 hours before and after dosing.

Question 5

How long can I safely take Telfast continuously?

Accepted Answer

Telfast can be taken throughout the entire hay fever season (typically March-September in the UK). Unlike some medications, tolerance does not develop with prolonged use. For year-round allergic rhinitis, continuous use is generally safe under medical supervision.

Question 6

What should I do if Telfast isn't controlling my symptoms effectively?

Accepted Answer

If symptoms persist after 3 days of proper use:

Question 7

Can children take Telfast 120mg tablets?

Accepted Answer

Telfast 120mg is approved for adolescents aged 12 years and over. For children aged 6-11 years, a lower strength (30mg) formulation is available and should be used instead. Children under 6 years should not take Telfast without paediatric specialist advice.

Question 8

Does Telfast interact with alcohol?

Accepted Answer

No significant pharmacokinetic interaction occurs between Telfast and alcohol. However, since both can cause drowsiness in some individuals, caution is advised when combining them, especially when driving or operating machinery.

Question 9

What's the difference between Telfast and cetirizine?

Accepted Answer

Both are second-generation antihistamines, but key differences include:

Question 10

Can I take Telfast if I have high blood pressure?

Accepted Answer

Generally yes, but with monitoring. Fexofenadine has minimal effects on blood pressure. However, if you're taking medications for hypertension, consult your doctor as individual responses may vary. Monitor for dizziness, especially when standing quickly.

Question 11

Is it safe to drive after taking Telfast?

Accepted Answer

Telfast is unlikely to affect driving ability, but the UK Driver and Vehicle Licensing Agency (DVLA) advises to test your individual response first. If you experience any drowsiness or dizziness, do not drive until these effects subside.

Question 12

What happens if I take a double dose by mistake?

Accepted Answer

If you accidentally take two tablets:

Question 13

Can I use Telfast for insect bite reactions or hives?

Accepted Answer

While Telfast is specifically licensed for hay fever, fexofenadine is effective for urticaria (hives) and allergic skin reactions. For insect bites or acute urticaria, it can provide symptom relief. For chronic urticaria, medical supervision is recommended for appropriate dosing.

Question 14

Does Telfast expire? How long is the shelf life?

Accepted Answer

Telfast tablets typically have a shelf life of 2-3 years from manufacture when stored properly. Always check the expiry date on the packaging (marked after EXP). Do not use after this date as effectiveness cannot be guaranteed.

Question 15

Can I take Telfast on an empty stomach?

Accepted Answer

Yes, Telfast can be taken on an empty stomach, but taking it before a meal is recommended for most consistent absorption. If you experience stomach upset, taking it with food may help, though this may slightly delay onset of action.

Product Name	Telfast
Manufacturer	Sanofi
Active Ingredient	Fexofenadine hydrochloride
Administration	Oral tablet
Presentation	Film-coated tablet
Available Strengths	120mg / 30 tablets
Product Type	POM — Prescription Only
Suitable for pregnancy?	Not recommended
Use with alcohol	Generally compatible with moderate consumption
Link to Patient Information Leaflet	Telfast PIL ↗

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