Health Centres - Qvar
How does it work?
Qvar CFC-free inhalers, autohalers and easi-breathe inhalers all contain the active ingredient beclometasone dipropionate (previously spelt beclomethasone in the UK), which is a type of medicine known as a corticosteroid.
Corticosteroids are hormones that are produced naturally by the adrenal glands. They have many important functions, including control of inflammatory responses. Beclometasone is a synthetic corticosteroid and is used to decrease inflammation in the lungs. (NB. Corticosteroids are often simply called steroids, but it should be noted that they are very different from another group of steroids, called anabolic steroids, which have gained notoriety because of their abuse by some athletes and body builders.)
When beclometasone is inhaled into the lungs it is absorbed into the cells of the lungs and airways. Here it works by preventing the release of certain chemicals from the cells. These chemicals are important in the immune system and are normally involved in producing immune and allergic responses that result in inflammation. By decreasing the release of these chemicals in the lungs and airways, inflammation is reduced.
In asthma, the airways tighten due to inflammation and can also be blocked by mucus. This makes it difficult for air to get in and out of the lungs. By preventing the inflammation and excess mucus formation, beclometasone makes it easier to breathe and helps prevent asthma attacks.
Beclometasone is taken using an inhaler device to treat asthma. Inhaling the medicine allows it to act directly in the lungs where it is needed most. It also reduces the potential for side effects occurring in other parts of the body, as the amount absorbed into the blood through the lungs is lower than if it is taken by mouth.
Beclometasone taken by inhaler is known as a preventer. This is because it is taken regularly to reduce the inflammation in the lungs and prevent asthma attacks. Symptoms usually start to get better between three to seven days after starting treatment. However, it is important to continue using this medicine regularly, even after your asthma symptoms have improved, in order to prevent them coming back.
What is it used for?
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Asthma
Warning!
- Do not exceed the dose of this medicine that your doctor has prescribed for you. Qvar inhalers are not the same potency as other beclometasone inhalers, including other CFC-free beclometasone inhalers. This means that the dose of Qvar needed to control your asthma symptoms may not be the same as that needed from other beclometasone inhalers. If you have been switched to a Qvar inhaler from another beclometasone inhaler, the dose of Qvar that your doctor asks you to use may be lower than you used to take from your old beclometasone inhaler.

