Question 1

How long does Telfast take to start working?

Accepted Answer

Telfast begins to relieve hay fever symptoms within 1 hour after taking the tablet. Most people notice improvement in sneezing, itching, and runny nose within that time.

Question 2

How long does a single dose of Telfast last?

Accepted Answer

A single 120 mg dose provides 24‑hour control of allergy symptoms, which is why it is taken once daily.

Question 3

How long does Telfast stay in your system?

Accepted Answer

The elimination half‑life of fexofenadine is about 14 hours. It takes roughly 2–3 days for the drug to be completely cleared from the body.

Question 4

Can I take Telfast with food?

Accepted Answer

Yes, but taking it with food may slightly delay absorption (by about 1 hour). For fastest relief, take it on an empty stomach before a meal.

Question 5

Does Telfast work immediately for severe allergies?

Accepted Answer

Onset is within 1 hour, but for severe symptoms, it may take a few days of regular use to achieve full control. Always follow your doctor’s advice.