Atrovent (ipratropium) is a bronchodilator that relaxes muscles in the airways and increases air flow to the lungs. Atrovent is used to prevent bronchospasm, or narrowing airways in the lungs, in people with bronchitis, emphysema, or COPD (chronic obstructive pulmonary disease). Atrovent may also be used for purposes not listed in this medication guide. You should not use Atrovent if you are allergic to ipratropium or atropine.