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Inhaled / intranasal corticosteroid (preventer)

Beclometasone: uses, side effects & precautions

Also known as Qvar, Clenil Modulite, Beconase, Becotide.

This information is for general guidance only and does not constitute medical advice. Always consult a qualified healthcare professional for personal medical concerns. In an emergency, call your local emergency number.

What it is used for

  • Asthma (regular prevention of symptoms) — inhaled form
  • Reducing airway inflammation to prevent asthma attacks
  • Hay fever and persistent allergic rhinitis — nasal spray form
  • Nasal congestion, sneezing, and runny nose due to allergy

How it works

Beclometasone is a steroid that calms inflammation in the airways or the lining of the nose. Used regularly, it reduces swelling and sensitivity, helping to prevent asthma symptoms or ongoing nasal allergy symptoms.

How it is taken

Available as an inhaler (preventer) for asthma and as a nasal spray for allergies. Both are used regularly rather than for instant relief. Use it exactly as your doctor, asthma nurse, or pharmacist directs. For the inhaler, rinsing your mouth after use can help reduce side effects.

No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.

Common side effects

  • Oral thrush (a fungal mouth/throat infection) with the inhaler
  • Hoarse voice or sore throat (inhaler)
  • Dry or irritated nose, or mild nosebleeds (nasal spray)
  • Unpleasant taste or smell
  • Headache

Serious effects — get help

  • Signs of a severe allergic reaction (swelling, difficulty breathing)
  • Blurred vision or eye problems (rare, with long-term use)
  • Symptoms of adrenal effects with high long-term doses (unusual tiredness, weight loss) — discuss with your clinician
  • Repeated or severe nosebleeds with the nasal spray

If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.

Interactions to watch

  • Certain antifungal and some HIV medicines (which can raise steroid levels)
  • Other steroid medicines (added effect)
  • Tell your clinician about all medicines, as combinations can occasionally matter

Who should take care

  • Tell your clinician if you are pregnant, planning pregnancy, or breastfeeding
  • Use it every day as prescribed, even when you feel well, for it to work
  • Rinse your mouth after inhaler use to reduce thrush and hoarseness
  • Tell any clinician you are using an inhaled or nasal steroid, especially if you become unwell or need surgery
  • Do not stop suddenly without advice if you have used it long term

Frequently asked questions

Is beclometasone a reliever inhaler?
No — it is a preventer. It works over time to reduce inflammation and must be used regularly. It will not relieve a sudden attack; a reliever does that.
Why should I rinse my mouth after using the inhaler?
Rinsing and spitting helps prevent oral thrush and hoarseness that the inhaled steroid can cause.
How long until the nasal spray works for hay fever?
It can take several days of regular use to reach full effect, so use it consistently rather than only when symptoms flare.
Is it safe to use a steroid inhaler long term?
Inhaled and nasal steroids deliver low doses directly where needed and are widely used long term under clinician supervision. Discuss any concerns with your doctor.

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