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purple and blue asthma inhalers

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Fostair

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Fostair is a red asthma inhaler. It contains a liquid solution which is inhaled daily to prevent asthma symptoms. Fostair is a combination inhaler containing two medicines which relax the muscles in your airways while also reducing swelling and inflammation. In order to benefit from your treatment, you need to use your inhaler on a daily basis.

Order your repeat prescription inhaler from Superdrug Online Doctor - prescription and delivery are included in the price. We can only provide you with a Fostair inhaler if your GP has previously prescribed it and you have successfully been using Fostair to control your asthma for at least three months. 

When you place your order we will ask you to answer a few questions about your asthma, so our doctor can check whether you can continue using Fostair. 

1 inhaler (100/6) £100

In a hurry? Choose Click and Collect and pick up your order after just 3 hours from a Superdrug Pharmacy.

Delivery options

Delivery method Cost Estimated delivery

You will choose your delivery option at the checkout. Delivery options may vary depending on the pack size and dosage chosen.

About Fostair
Fostair contains two ingredients, which prevent asthma symptoms. One ingredient is the corticosteroid beclometasone dipropionate, which reduces swelling and inflammation. The second active ingredient is formoterol fumarate dihydrate, which relaxes the muscles in your airways, opening them up so you can breathe more easily.

The Fostair inhaler works in two ways. If used on a daily basis, it works as a preventer inhaler which reduces your symptoms in the long term. In addition to preventing asthma, Fostair is sometimes prescribed to be used as a reliever inhaler as well.

You will either be using Fostair in combination with a blue reliever inhaler, or as a standalone treatment. Your GP will decide whether you require an additional reliever inhaler or whether you can use Fostair to relieve acute symptoms.
Using Fostair in combination with a reliever inhaler

The usual dosage when using Fostair as a preventer inhaler only is one to two puffs twice every day. Your GP will advise you on the exact dose you require. Do not exceed four puffs in any 24h period. Always ensure you have your reliever inhaler with you, in case you suffer acute symptoms.

Using Fostair as a preventer and reliever inhaler


When using Fostair to prevent and relieve symptoms, you will usually be advised to take one puff twice daily.

However, if you experience asthma symptoms, take one puff. You should wait several minutes for the medication to take effect. If your symptoms do not improve, you can take another puff. Do not exceed a reliever dose of six and a daily dose of eight puffs in total (a maximum of two preventer and six reliever puffs).

If your asthma worsens and the recommended dosage of Fostair is no longer sufficient to control your asthma, ask your GP for advice. You may require a different treatment.
Some patients experience side effects when using a Fostair inhaler.

Common Fostair Side Effects

  • fungal infections of the mouth and throat
  • headache
  • hoarseness
  • sore throat
For a full list of uncommon and rare side effects, read the patient leaflet supplied with your inhaler.

Medications like Fostair that contain steroids can cause a rare eye problem called ‘central serous chorioretinopathy’. If you find you are having trouble seeing properly while taking your Fostair then you need to get medical attention straight away.

Stop using Fostair if you experience:

wheezing and shortness of breath after using your inhaler (if this happens, use a blue reliever inhaler immediately)
allergic reactions such as skin rash and itching, facial swellings

If you experience either of these reactions, contact your doctor immediately. You will require an alternative asthma treatment.

Do not use a Fostair inhaler if you are allergic to any of the ingredients. Ask your GP to recommend an alternative medication.

Tell your doctor if you:

  • have or have had heart problems
  • have or have had tuberculosis
  • have arteriosclerosis or high blood pressure
  • have any disorders of your heart rhythm
  • have an overactive thyroid gland
  • have low levels of potassium in your blood
  • have a liver or kidney disease
  • have diabetes
  • have a tumour of the adrenal gland
  • are due to be given an anaesthetic (you may need to stop taking Fostair prior to being anaesthetized)
  • have a chest infection
Certain medications can interact with Fostair. These include:

  • beta blockers (a blood pressure medication)
  • medicines for treating abnormal heart rhythms and other heart conditions
  • antihistamines (used to treat allergic reactions)
  • anti-depressants and other medications used to treat mental disorders
  • medicines for the treatment of Parkinson’s disease
  • medicines containing oxytocin (which causes uterine contractions) and alcohol
  • other asthma medications
  • water tablets
  • some anaesthetics