The most common short acting Anticholinergic  used for COPD patients is:Group of answer choicesAtroventSalmeterolTheophyllineAlbuterol

The most common short-acting anticholinergic used for COPD (Chronic Obstructive Pulmonary Disease) patients is Atrovent, which is the brand name for ipratropium bromide.

Anticholinergic medications work by blocking the action of acetylcholine in the airways, leading to bronchodilation, which helps to relieve symptoms such as wheezing and breathlessness. While Salmeterol is a long-acting beta agonist, Theophylline is a methylxanthine, and Albuterol is a short-acting beta agonist, Atrovent is specifically recognized for its anticholinergic properties and is commonly prescribed for managing COPD.

In summary, for short-acting anticholinergic therapy in COPD, Atrovent is the typical choice.