Budesonide and Formoterol Inhalers for Asthma Management
What are Budesonide and Formoterol?
Budesonide and formoterol are medications that are frequently prescribed for asthmatics. They're generally used in an inhaled form to prevent an asthma attack from developing. Budesonide is a corticosteroid that reduces inflammation in the airways. Formoterol causes bronchodilation, or widening of the airways. The medications may be sold in separate inhalers or may be combined in the same one.
A popular product that contains both medications is Symbicort. This inhaler is used daily, even when an asthmatic is healthy. I use a Symbicort inhaler to manage my asthma. It has its disadvantages. It’s an expensive medication. In addition, I don’t like taking medications on a daily basis. I find that Symbicort is very effective when I use it regularly, however. If I stop using it my asthma soon returns.
A combination of budesonide and formoterol is helpful for me and for many other people, but it may not be appropriate for you if you're an asthmatic. I’m a biology teacher and a science writer, not a medical practitioner, so make sure that you see your doctor if you want to use either or both of these medications. They may have side effects, which can occasionally be serious. In addition, they shouldn't be used in combination with specific medications or if you have certain medical conditions.
What is Asthma?
The airways are the tubes that transport inhaled air into and through the lungs so that oxygen can be absorbed into the bloodstream. They also transport exhaled air out of the lungs to the outside world. This exhaled air contains carbon dioxide waste picked up from the blood.
During an asthma attack, the muscles around the airways tighten and the airways constrict. This makes it very hard for a person to inhale enough air. In addition, the linings of the airways become inflamed and swollen and there is an increased production of mucus. The mucus may block the airways.
Common symptoms of an asthma attack include:
- difficulty breathing
- chest tightness
- a wheezing or whistling sound as the person tries to breathe
- coughing as the person attempts to clear the airways of mucus
Asthma medications can be very effective. The disorder has the potential to be an emergency or even a deadly condition, however. This is why an asthma management plan is so important for asthmatics. If the plan no longer controls the symptoms, a new plan needs to be established with the help of a doctor.
Causes of Asthma
Although the triggers for asthma attacks are known, the reason why an asthmatic's body responds inappropriately to a trigger isn't clear. There seems to be a genetic component to asthma, since the disorder often runs in families.
Common triggers for asthma attacks include allergens such as house dust or pollen, smoke or pollution in inhaled air, physical stress caused by exercise, the inhalation of cold air or the presence of a viral infection such as a cold or the flu.
Asthma can't be cured, but asthma attacks can be treated. They can often be prevented as well. Asthmatics need to discover their own particular triggers and find ways to weaken or prevent asthma attacks. A doctor's advice is vital.
Asthma is becoming increasingly common in some parts of the world, including North America. The reason for this trend is unknown, although there are several theories that attempt to explain the observation. A better understanding of the causes of asthma may lead to improved treatments and prevention strategies.
How to Treat Asthma
A medication has a chemical name (which follows the international rules for naming chemical compounds and may be complex), a generic name (the name given to the chemical when it's supplied to the pharmaceutical industry) and a brand name (the name given to the chemical by a specific drug company).
Asthma medications are often designed to be inhaled. The inhalers fall into two general categories - rescue inhalers that are used during an asthma attack and maintenance inhalers that are used between attacks.
Although most asthma medications are inhaled, oral (ingested) medications may also be prescribed to prevent asthma attacks.
Rescue or Reliever Inhalers
Most asthma medications are inhaled so that the medicine goes straight to the lungs. Albuterol, also known as salbutamol, is the generic name of a common medication used in rescue or reliever inhalers. These are used to relieve symptoms during an asthma attack. A frequently prescribed brand of albuterol is Ventolin.
Rescue inhalers are often blue. Unfortunately, the colour coding for asthma inhalers is not universal, which may be confusing for patients. An asthma attack may appear suddenly. If a person is unable to read medication labels clearly, it's very helpful for them to know that the blue inhaler will relieve their symptoms.
Most rescue asthma medications are delivered in a metered dose inhaler. This is a device that delivers a controlled amount of medication when the canister is depressed. The medication is delivered in the form of an aerosol.
How to Use a Metered Dose Inhaler
Maintenance, Preventer or Controller Inhalers
Maintenance inhalers are used according to a regular schedule in order to reduce or prevent asthma attacks. They maintain the health of the airways and prevent them from responding abnormally to a stimulus.
Budesonide is the generic name of a corticosteroid that is used in maintenance or preventer inhalers. One brand name of budesonide that is often used is Pulmicort. Fluticasone is the generic name of another inhaled corticosteroid used to prevent asthma. Flovent is a brand of fluticasone. Advair contains both fluticasone and salmeterol, which is a bronchodilator.
Maintenance inhalers have a colour other than blue. The medication is often delivered by a device known as a turbuhaler. The use of a Symbicort turbuhaler is demonstrated in the video below.
Formoterol falls into a third category of asthma medications - it has some ability to act as a rescue medicine and also acts as a maintenance medicine. Foradil is a common brand of formoterol.
How to Use a Turbuhaler
Budesonide Benefits and Side Effects
Budesonide is the generic name of an artificial corticosteroid. It's prescribed for long-term use to prevent asthma flare-ups and the repeated use of rescue inhalers. When inhaled regularly, the medication reduces inflammation and hyperactivity in the air passages. Inhaled budesonide exerts its main effect on the lungs. Only a small amount is absorbed into the body.
Inhaled budesonide may produce side effects. These may not the same as those created by taking oral budesonide, or may not be as severe, since only some of the inhaled medication enters the bloodstream. Inhaled budesonide may encourage the development of an oral infection called thrush. This infection is caused by a fungus and appears as white spots in the mouth and throat. Rinsing the mouth out thoroughly after using the inhaler can prevent the infection from happening. (This works for me.) Other side effects may be a sore throat and a hoarse voice.
More serious problems are less likely, but if large doses of inhaled budesonide are taken for a long time some of the side effects caused by oral corticosteroids may develop. These include thinning of bones, slow growth in children, cataracts, glaucoma, and inhibition of natural corticosteroid production by the adrenal glands. Rarely, a person may be allergic to budesonide, may experience breathing difficulties after using the medication or may experience problems such as nervousness, depression or behavioral changes.
Formoterol is a bronchodilator, which means that it widens the airways, or the bronchi and the bronchioles. Formoterol belongs to a class of medications known as beta-agonists. A beta-agonist binds to beta receptors, including those found on the cell membranes of muscle cells around the airways. When beta-agonists bind to the beta receptors they cause the muscles to relax, widening the airways.
There are two kinds of beta-agonists. Short-acting types (such as albuterol) begin to work within a few minutes and continue to work for four to six hours. They're used in rescue or reliever inhalers. Formoterol is a long-acting beta agonist. It starts working quickly and keeps working for about twelve hours. It's inhaled on a schedule - usually in the morning and in the evening - to prevent asthma attacks.
Symbicort is delivered to the airways in the form of a very fine power. To send a dose of powder into the delivery area, the red wheel at the base of the turbuhaler must be turned as far as it can in one direction and then as far as it can in the other direction. A click will be heard during this procedure.
Formoterol Side Effects
Formoterol should never be used as the only asthma medication because in a few cases a related long-acting beta-agonist has been found to make asthma attacks worse instead of better. It's not known if formoterol has the same effect, but the possibility exists. The current recommendations are that if a person needs to use formoterol, the formoterol inhalation should be accompanied by an inhaled corticosteroid, such as budesonide, and the rescue inhaler shouldn't contain formoterol.
Formoterol has a range of possible side effects. As is the case for budesonide use and the use of many other medications, not everyone will experience side effects from formoterol treatment, but some people will. The side effects will generally be minor, but major problems may develop. Relatively minor symptoms include a headache, dizziness, nausea, stomach pain, muscle pain, sore throat, dry mouth, shakiness, tiredness and insomnia. If these side effects continue or are severe a doctor should be consulted. More serious symptoms include a rapid and irregular heartbeat, a rash, and swelling of the face, throat or extremities.
How to Prevent an Asthma Attack - Using a Peak Flow Meter
A peak flow meter measures how fast air leaves the lungs. This information can be a valuable component of an asthma management plan. It indicates whether or not an asthmatic is keeping their airways clear.
Preventing an Asthma Attack
The ideal situation for an asthmatic is to avoid personal triggers and to use as little medication as possible. However, if the asthma is proving hard to control, a higher level of medication may be needed.
Rescue inhalers shouldn't be used frequently. If they're used too often they can cause additional health problems, such as a rapid heartbeat. Frequent use of a rescue inhaler indicates that asthma is out of control.
If you realize that you are losing control of your asthma, you need to talk to your doctor to come up with a new treatment plan that is both safe and effective. When asthma is properly managed, a person with the disorder should be able to live a normal life. There may one day be a cure for asthma, but until that time its management is very important.
More Asthma Information
© 2012 Linda Crampton
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