Stable COPD: Initiating and Optimizing Therapy

Pulmonary Disease Board Review. 2019 July;16(1)

From the University of Florida, Gainesville, FL (Dr. Aljaafareh and Dr. Fakih), and Parkview Regional Medical Center, Fort Wayne, IN (Dr. Biswas).

References

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What is the role of inhaled corticosteroids in COPD?

Inhaled corticosteroids (ICS) are believed to work in COPD by reducing airway inflammation.⁴¹ ICS should not be used alone for COPD management and are always combined with a LABA.⁷ Several ICS formulations are approved for use in COPD, including budesonide and fluticasone. ICS has been shown to decrease symptoms and exacerbations, with modest effect on lung function and no change in mortality.⁴² Side effects include oral candidiasis, dysphonia, and skin bruising.⁴³ There is also an increased risk of pneumonia.⁴⁴ ICS are best reserved for patients with a component of asthma or asthma–COPD overlap syndrome (ACOS).⁴⁵ ACOS is characterized by persistent airflow limitation with several features usually associated with asthma and several features usually associated with COPD.⁴⁶

What if the patient is still symptomatic on a LABA or LAMA?

For patients whose symptoms are not controlled on one class of LABA, recommendations are to add a bronchodilator from the other class.⁷ There are also multiple combined LAMA-LABA inhalers that are approved in the United States and can possibly improve adherence to therapy. These include tiotropium-olodaterol, umeclidinium-vilanterol, glycopyrronium-indacaterol, and glycopyrrolate-formoterol. In a large systematic review and meta-analysis comparing LABA-LAMA combination to either agent alone, there was a modest improvement in post-bronchodilator FEV₁ and quality of life, with no change in hospital admissions, mortality, or adverse effects.⁴⁷ Interestingly, adding tiotropium to LABA reduced exacerbations, although adding LABA to tiotropium did not.⁴⁷

Current guidelines recommend that patients in GOLD categories C and D who are not well controlled should receive a combination of LABA-ICS.⁷ However, a new randomized trial showed better reduction of exacerbations and decreased occurrence of pneumonia in patients receiving LAMA-LABA compared to LABA-ICS.⁴⁸ In light of this new evidence, it is prudent to use a LAMA-LABA combination before adding ICS.

Triple therapy with LAMA, LABA, and ICS is a common approach for patients with severe uncontrolled disease and has been shown to decrease exacerbations and improve quality of life.^7,49 Adding tiotropium to LABA-ICS decreased exacerbations and improved quality of life and airflow in the landmark UPLIFT trial.²⁷ In another clinical trial, triple therapy with LAMA, LABA, and ICS compared to tiotropium alone decreased severe exacerbations, pre-bronchodilator FEV₁, and morning symptoms.⁵⁰ A combination of triple therapy with fluticasone furoate, umeclidinium, and vilanterol was recently noted to result in a lower rate of moderate or severe COPD exacerbations, preserve lung function, and maintain health-related quality of life, as compared with fluticasone furoate/vilanterol or umeclidinium/vilanterol combination therapy among those with symptomatic COPD with a history of exacerbations.⁵¹

Is there a role for theophylline? Other agents?

Theophylline

Theophylline is an oral adenosine diphosphate antagonist with indirect adrenergic activity, which is responsible for the bronchodilator therapeutic effect in patients with obstructive lung disease. It is also thought to work by an additional mechanism that decreases inflammation in the airways.⁵² Theophylline has a serious adverse-effect profile that includes ventricular arrhythmias, seizures, vomiting, and tremor.⁵³ It is metabolized in the liver and has multiple drug interactions and a narrow therapeutic index. It has been shown to improve lung function, gas exchange and symptoms in meta-analysis and clinical trials.^54,55