Combination therapy for Asthma and COPD: a look at Advair.
Advair was approved in 2000 by the FDA and is made by the pharmaceutical company GlaxoSmithKline. The cost of this drug is about $220.00 per month depending on what pharmacy you go to, and the type of insurance you have. An interesting fact about the pharmaceutical company, GlaxoSmithKline that manufactures Advair, was that they reported 4 billion dollars in sales during the first five months in 2005. ("Drugs", 2008) Advair is a combination of two drugs, fluticasone and salmeterol. Fluticasone is a steroid and salmeterol is a non-rescue bronchodilator. When used together these drugs help treat symptoms associated with an obstructive pulmonary disease, namely asthma, emphysema, and chronic bronchitis. Salmeterol is a long-acting beta 2 adrenergic agonist (LABA); it works by relaxing the smooth muscles in the bronchus to improve the function of breathing. Salmeterol is different than other bronchodilators, because it does not act as fast as others to relieve an asthma attack once it has started ("Health Reference", 2008). Fluticasone is a steroid that helps with the inflammation of the airways (Gardenhire, 2008). It belongs to the family of medicines known as corticosteroids. Advair is used when a patient's condition is not controlled by a fast acting bronchodilator such as, albuterol and more than one maintenance drug is needed ("Health Reference", 2008).
There are two phases to asthma, the early phase and late phase. It is very critical that a person with asthma takes their fast-acting bronchodialtor first at the onset of an asthma attack, and then takes Advair. Advair will help them overcome the late phase of asthma, which starts 6-8 hours after their initial response, and can last up to 24 hours (Gardenhire, 2008)! Asthma is a disease that causes inflammation of the airways to constrict. Asthma causes wheezing, coughing, and a tight chest feeling, especially at night or in the early morning. COPD or chronic bronchitis is also inflammation of the airways and excess mucous production, which causes a chronic cough. In chronic bronchitis there is excessive mucous production and cough for a period of three months or more for two consecutive years. Cigarette smoking is generally the cause of this disease and the reason why the chronic cough is referred to as "smokers cough" ("Mayo clinic," 2006).
The mechanism of action for salmeterol is a (LABA) long-acting beta 2 adrenergic agonist. Studies (2007) have shown, "salmeterol is at least 50 times more selective for beta 2 adrenoceptors than albuterol" (p. 3). The pharmacologic effects of a beta 2-adrenoceptor agonist drugs stimulate adenyl cyclase to cyclic 3'5' adenosine monophosphate (cyclic AMP). Increased levels cause the relaxation of bronchial smooth muscle and inhibit the release of mast cells. (Gardenhire, 2008) A warning label included in the package insert for Advair contains a warning that long-acting beta 2 adrenergic agonists, salmeterol can increase the risk of an asthma-related death. It is important for a physician to ask specific questions when prescribing this drug to them. This medication is not for patients that have asthma that is adequately controlled on other forms of asthma-controlled medications. A clinical study in 1997 found that there were 13 deaths out of 13, 176 patients that were treated for 28 weeks on Salmeterol ("PDR", 2007). The mechanism of action for fluticasone is a synthetic corticosteroid with a potent anti-inflammatory activity. It inhibits many different cell types including mast cells, eosinophils, basophils, lymphocytes, macrophages, and neutrophils. Another similar drug that is the new alternative to Advair is called Symbicort. Symbicort has formoterol and budesonide and is a metered dose inhaler. Formoterol is a non- rescue long-acting bronchodilator that relaxes the muscles in the airways to improve breathing. Budesonide is a steroid that reduces inflammation in the airways. Symbicort is also used to treat bronchospasm in people with COPD, chronic bronchitis and asthma ("Drugs, 2008"). The difference between these two drugs is that formoterol has an onset of 15 minutes and a peak time of 30-60 minutes when compared to Salmeterol's onset of 20 minutes and peak time of 3-5 hours (Cardenhire, 2008).
Advair's dosing should be administered orally inhaled only and given twice daily. If this drug is to be given in a sequence, Advair is to be given last. First, the fast acting rescue bronchodilator is given (SABD), along with mucomyst if needed. The very last drug given would be Advair, making sure the patient rinses and spits afterwards. Advair Diskus is a powder form of fluticasone and salmeterol that comes in a special inhaler device preloaded with blister packs that contain measured doses of medicine. Advair also comes in an HFA inhaler; this is considered the more "green" approach, and is better for the environment when compared to a metered dose inhaler. After the drug is inhaled, rinsing the mouth without swallowing is ideal to prevent the growth of yeast in the mouth. There are three combinations of dosages available, the smallest dosage is 100mcg/50mcg, the intermediate dosage is 250 mcg/50mcg, and the highest dosage is 500mcg/50mcg. Another important factor to consider when taking a dry powder inhaler is that the patient must be able to generate air flow at least 60 liters per minute to adequately take the medication (Gardenhire, 2008).
Many concerns have been raised that salmeterol may increase the risk of an asthma-related death. Research has shown that the African-American ethnicity has a higher risk than Caucasian ("PDR", 2007).
In conclusion, I researched in the Asthma and COPD guidelines in Appendix D and found that Advair is to be given at step 2, mild persistent asthma the preferred treatment is a low-dose inhaled corticosteroid. From all of this research and case studies, I found that Advair is safe for use, even though there were deaths related to the use of this drug. It's too bad that this drug was not available 15 years ago, when my younger sisters suffered from asthma. I feel they could've benefited from it to increase their quality of life.
LeAnn Garcia is a RC Student at Spoakane Community College in Spoakane, WA. Her paper on combination therapy was chosen from papers submitted to Focus for this issue.
Ms. Garcia will receive a $100 gift certificate and a gratis registration to the 2009 Focus Conference. Her school's RC Program will also receive a $100 donation.
Students are encouraged to submit their papers for the Mar/Apr issue by Feb 15th. Papers should be 900-1250 words and should be submitted as MS Word files to Craig Baker at CkerCT78@yahoo.com.
by Respiratory Care Student LeAnn Garcia
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|Title Annotation:||STUDENT PAPERS|
|Publication:||FOCUS: Journal for Respiratory Care & Sleep Medicine|
|Date:||Jan 1, 2009|
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