Evaluation of Bedoradrine Sulfate (MN-221), a Novel, Highly Selective Beta2-Adrenergic Receptor Agonist for the Treatment of Asthma via Intravenous Infusion

Background. The number of hospitalizations or deaths due to asthma, most of which result from acute exacerbations of asthma, has remained the same for the past 20 years. MN-221 (bedoradrine sulfate) is a novel, highly selective beta2- (β2-) adrenergic agonist administered via intravenous (IV) infusion in development for the treatment for acute exacerbation of asthma. Objectives. Trial MN-221-CL-004 assessed the safety profile and preliminary efficacy of MN-221 in escalating doses in patients with stable mild-to-moderate asthma. Study MN-221-CL-005 assessed the safety profile and preliminary efficacy of MN-221 in patients with stable moderate-to-severe asthma when given as a fixed dose over 1- or 2- hr infusion. Methods. Two randomized, placebo-controlled clinical trials (n = 40) were performed to evaluate the pharmacokinetic (PK) and clinical effects of a novel, highly selective β2-agonist, MN-221, via IV infusion. Safety evaluations included vital signs, adverse events (AEs), clinical laboratory paramete...