Xopenex (levalbuterol) is a short-acting bronchodilator that relaxes muscles in the airways and increases air flow to the lungs. Xopenex inhalation is used to treat or prevent bronchospasm in people with reversible obstructive airway disease. Xopenex solution is for use in adults and children 6 years of age and older. Xopenex HFA aerosol is for use in adults and children 4 years of age and older.