Four studies comparing the efficacy of bronchodilators in acute exacerbations of COPD have failed to discern a difference among adrenergic agents,
anticholinergic agents, or their combination (33,56-58). Current guidelines recommend combination therapy with adrenergic and anticholinergic agents (53,54).
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If you suffer with asthma, you will no doubt be familiar with the uncomfortable sensations as your bronchial tubes begin to narrow and your muscles around them start to tighten. A sticky mucus known as phlegm begins to produce and increase within your bronchial tubes and you begin to wheeze, cough and struggle to breathe.