Lyng Pharmacy
Medicines A–Z · Inhaled corticosteroid

Beclometasone Inhaler

A preventer inhaler · Written by the Lyng Pharmacy team, based on NHS and BNF guidance · Updated August 2026
Also sold asClenil Modulite, Qvar, Fostair
Type of medicineInhaled corticosteroid
Available asInhaler, nasal spray
How you get itPrescription only

Beclometasone is a preventer inhaler. It does nothing you can feel in the moment, which is precisely why people stop taking it — and stopping it is the commonest reason asthma gets worse. It treats the underlying airway inflammation that the blue reliever never touches.

What it is used for

Preventing asthma symptoms and attacks by reducing inflammation in the airways. Some products combine it with a long-acting reliever — those are used differently, so follow your own instructions.

It is not for treating an attack. Keep using it every day, including when you feel completely well.

How to use it

Usually one or two puffs twice a day, or as prescribed. Shake, breathe out gently, seal your lips around the mouthpiece, take a slow deep breath in as you press, then hold your breath for about ten seconds. Wait 30 seconds between puffs.

A spacer improves delivery significantly and reduces side effects in the mouth. Ask us to check your technique — poor technique is very common and fixable in a couple of minutes.

Rinse your mouth with water and spit it out after every dose. This is the single best way to avoid oral thrush and a hoarse voice, the two most common side effects.

Different beclometasone brands are not equivalent puff for puff. If your inhaler looks different from usual, check with us before using it.

Side effects

Oral thrush (white patches in the mouth), a hoarse voice and a sore throat are the common ones, and rinsing after use largely prevents them. Come and see us if thrush develops — it is easily treated.

At high doses over long periods, inhaled steroids can have wider effects, which is why the dose is kept to the lowest that keeps control.

Children on regular inhaled steroids should have their growth monitored as part of routine asthma review — that is normal practice, not a sign of concern.

Getting the most from it

Have an asthma review at least yearly, and take your inhalers with you. Ask for a written asthma action plan if you do not have one — people with a plan end up in hospital less often.

Needing your blue reliever three or more times a week means control is not good enough. That is a preventer conversation, not a reliever one.

Always read the label. This page is general information, not advice for your situation. Doses, warnings and interactions differ between products and between people. Check the leaflet inside your medicine, and ask our pharmacist if anything is unclear — that conversation is free and takes two minutes.

Questions about Beclometasone inhaler?

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Frequently asked questions

Why do I have to rinse my mouth after my preventer inhaler?
Rinsing and spitting after each dose largely prevents oral thrush and a hoarse voice, the two most common side effects of inhaled steroids.
Can I stop my preventer inhaler when I feel well?
No. Feeling well is the preventer working. Stopping it is the commonest reason asthma control slips.
Are all beclometasone inhalers the same?
No. Different brands are not equivalent puff for puff. If your inhaler looks different from usual, check with us before using it.
Should I use a spacer?
A spacer improves how much medicine reaches the lungs and reduces mouth side effects. It is useful for adults as well as children.

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