Duoneb is irpatropium bromide (a bronchdilator) and albuterol (a beta-agonist) combined in a single neb. You get a full dose of each in half the time.

It works really well during an exacerbation as it opens my lungs and eases the spasms - quiets cough and eases tightness in one. The rest of the time I use levalbuterol, because the duoneb send my tremors into overdrive.

Sue