ACLIDINIUM; FORMOTEROL treats chronic obstructive pulmonary disease (COPD). It works by opening the airways of the lungs, making it easier to breathe. It is a combination of an anticholinergic and a bronchodilator. It is often called a controller inhaler. Do not use it to treat a sudden COPD flare-up. Get Duaklir Pressair for as low as $290.56, which is 35% off the average retail price of $449.10 for the most common version, by using a GoodRx coupon.