Randomized, Placebo-controlled, Multi-dose, Study Comparing Budesonide/Formoterol to Symbicort® in Asthmatic Patients

This is a pivotal trial that will examine therapeutic equivalence of a new generic fixed-dose combination product containing Budesonide 80 mcg / Formoterol fumarate dihydrate 4.5 mcg and reference listed drug (RLD) Symbicort® inhalation aerosol in adult patients with chronic but stable asthma as defined in National Asthma Education and Prevention Program Expert Panel Report 3 (NAEPP 3) guidelines. To ensure adequate study sensitivity the test and reference products should both be statistically superior to placebo (p\<0.05) with regard to the bioequivalent study primary endpoints. A secondary study objective is the safety and tolerability of the test compound.