Long-Acting Beta Agonists: Salmeterol and Formeterol

Salmeterol and Formeterol
Two long-acting ß 2 -adrenergic agonists (LABAs), salmeterol and formoterol, have been demonstrated to be safe and effective agents in children, both in terms of bronchodilation and prevention of exercise-induced bronchospasm. Their onsets of action differ, with formoterol having an onset similar to albuterol (3 minutes), while salmeterol has a slower onset of action (10–20 minutes). Following a single-dose administration, both agents demonstrate durations of action up to 12 hours. Following regular twice-daily administration, bronchodilation remains effective; however, a level of tolerance (or tachyphylaxis) (more…)

Long Acting Agonist (ß2) Therapy to Inhaled Corticosteroids in Persistent Asthma?

long acting agonist
Current internationally recognized guidelines indicate that symptomatic asthmatics using a low to medium inhaled corticosteroid dose (400–800 µg/day of beclomethasone or equivalent) alone should preferentially be commenced on a long-acting agonist ß2 prior to an leukotriene receptor antagonists LTRA (British guideline on the management of asthma 2003; GINA Workshop Report 2004). However, two recent large trials have performed head to-head comparisons of add-on long-acting ß2 agonist versus LTRA as therapeutic adjuncts to inhaled corticosteroids, using exacerbation frequency (rather than lung function and symptoms) as the primary end point. (more…)

Montelukast Side Effects as Antileukotrienes Therapy to Inhaled Corticosteroids in Asthma

antileukotrienes therapy
Despite optimum drug delivery and good compliance with inhaled corticosteroids, many patients experience symptoms and exacerbations. Dose–response studies using inhaled corticosteroids have generally been unable to demonstrate any significant difference between individual doses of inhaled corticosteroids. For example, a metaanalysis evaluated eight studies (2324 asthmatics) where the effects of at least two doses of inhaled fluticasone were measured. (more…)

Budesonide Inhalation Dose versus Maintenance Treatment in Asthma Exacerbations

budesonide inhalation
This study was similar to the study of Harrison and colleagues, which looked at doubling the dose of inhaled corticosteroid during an asthma exacerbation. This study investigated whether doubling the dose of budesonide inhalation in patients on regular inhaled budesonide would be beneficial during an asthma exacerbation. (more…)

Tumour Necrosis Factor Alpha in Symptomatic Corticosteroid-Dependent Asthma

Tumour Necrosis Factor Alpha
Tumour necrosis factor alpha (TNF-a) is a major therapeutic target in a range of chronic inflammatory disorders involving neutrophils and its excess production is characterized by a Th1-type immune response. Asthma is regarded as a Th2-type disorder when associated with atopy, (more…)

Asthma LABA ICS Combination Therapy

Asthma LABA ICS
For most patients, asthma is not controlled as defined by guidelines; whether this is achievable has not been prospectively studied. It is also not known whether combination LABA ICS therapy is more likely to achieve this than an increased dose of ICS.

Control was achieved more rapidly and at a lower inhaled corticosteroid asthma dose with salmeterol/fluticasone than with fluticasone. This study confirms that the goal of guideline derived asthma control was achieved in most of the patients. (more…)

Effect Of Pet Removal On Pet Allergic Asthma

Allergen avoidance has been recommended in the management of allergic asthma children. Very few studies have assessed the effect of pet removal on pet allergic asthma. The authors examined the effect of pet removal from homes on pulmonary function testing, bronchial
hyper-responsiveness and medication use. This was a prospective, controlled but non-randomized and open study. Subjects included 20 symptomatic patients with newly diagnosed pet allergic asthma who were keeping domestic animals, including hamsters, cats, dogs and ferrets, and were sensitized to these animals. (more…)

Daily Versus As-Needed Corticosteroids For Mild Persistent Asthma

The guidelines for asthma management recommend the use of regular inhaled corticosteroid in patients with mild persistent asthma, but in clinical practice it has been observed that patients often do not feel the need to use their inhaled corticosteroid regularly, which may lead to poor compliance. One possible reason is that because there are no symptoms the patients are not reminded to use their medications. Hence, the use of intermittent inhaled corticosteroid during worsening of asthma may be an option that could be considered in these subgroups of asthmatics. (more…)

Doubling The Dose Of Inhaled Corticosteroid To Prevent Asthma Exacerbations

Inhaled Corticosteroid Asthma
The management of asthma in the community involves patient education to avoid the triggers, doubling the dose of inhaled steroids and increasing the use of rescue medications during an exacerbation in order to prevent unnecessary hospital visits. This randomized, controlled study looks at whether doubling the dose of inhaled corticosteroid in isolation is effective when asthma deteriorates. (more…)

Dual Tachykinin NK1/NK2 Antagonist Dnk333 Inhibits Neurokinin A-Induced Bronchoconstriction In Asthma Patients

The sensory neuropeptides substance P and neurokinin A (NKA) are members of the tachykinin family, present within pulmonary sensory nerves and immune cells. In the airways they mainly interact with tachykinin (NK1, NK2) receptors to induce bronchoconstriction, bronchial hyperresponsiveness, mucus secretion, vasodilatation, increased vascular permeability, and attraction and activation of inflammatory cells. In this randomized, double-blind, placebocontrolled crossover multicentre trial the effects of a single dose of a dual tachykinin NK1/NK2 receptor, DNK333, were assessed on NKA-induced bronchoconstriction in asthma. (more…)