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For mild to moderate asthma, inhalers provide an effective, safe and easy to use treatment that delivers drugs directly to the airways. As only very small quantities of the drug will get into the bloodstream, systemic side effects are minimal or negligible.

The attachment of a spacer device to the inhaler helps increase the delivery of drugs and is particularly useful in small children or those whose inhaler technique is not optimal. Medication designed for inhalation can also be delivered via nebulisers, ‘misting machines’, which are driven either by battery or plugged into the mains.

There are two main types of asthma medication:

  • Relievers, also called short-acting bronchodilators: often delivered in a blue or white inhaler, these work quickly and can produce almost immediate relief from mild to moderate chest tightness. Relievers may need to be used several times a day as their effect wanes after a while. The most widely used short-acting bronchodilator is salbutamol, a beta2 agonist which works by relaxing the smooth muscles in the airway walls.
  • Preventers: these medications are usually steroids (corticosteroids rather than anabolic steroids) and work by decreasing the inflammatory response in the airways. They may come in a brown or beige inhaler device and their effect is slower than that of relievers but lasts longer. As a result, they are usually used twice a day. The dose of steroids in inhalers is low and delivered directly to the desired site of action.

Other medication used to treat asthma

In cases where asthma symptoms prove particularly difficult to control despite the above medication, it is usual to either increase the dose of inhaled steroids or add in a long-acting beta agonist (LABA). These two drugs are often combined into the same inhaler. Combination inhalers come in a variety of devices so it is important that the correct one is chosen to ensure ease of use.

A short course of oral steroids may prove necessary for some patients whose asthma exacerbation is particularly severe and inhaled treatment on its own proves ineffective.

Other drugs available to the treating physician include those designed to target particular inflammatory pathways or to produce additional bronchodilatation above what may be achieved by first-line drugs. A number of immunomodulatory drugs are also in development. One such agent currently available is a monoclonal antibody that neutralises IgE, the antibody that promotes allergic reactions.


This treatment, provided by The London Clinic's physiotherapy service, aims to reduce symptoms, including shortness of breath, coughing and asthma attacks.

Find out more about butekyo breathing and watch our video




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