Procaterol, applied as procaterol hydrochloride (USAN

United States Adopted Name

United States Adopted Names are unique nonproprietary names assigned to pharmaceuticals marketed in the United States. Each name is assigned by the USAN Council, which is co-sponsored by the American Medical Association , the United States Pharmacopeial Convention , and the American Pharmacists...

), is a short-acting β₂-adrenergic receptor agonist

Beta2-adrenergic receptor agonist

β2-adrenergic agonists, also known as β2-adrenergic receptor agonists, are a class of drugs used to treat asthma and other pulmonary disease states.-Uses:...

 used for the treatment of asthma. It has never been filed for FDA

Food and Drug Administration

The Food and Drug Administration is an agency of the United States Department of Health and Human Services, one of the United States federal executive departments...

 evaluation in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, where it is not marketed. The drug is readily oxidated

Redox

Redox reactions describe all chemical reactions in which atoms have their oxidation state changed....

 in the presence of moisture and air, making it unsuitable for therapeutic use by inhalation. Pharmaceutical company Parke-Davis

Parke-Davis

Parke-Davis is a subsidiary of the pharmaceutical company Pfizer. Although no longer an independent corporation, it was once America's oldest and largest drug maker, and played an important role in medical history.- History :...

/Warner-Lambert researched a stabilizer to prevent oxidation, but an effective one was never developed.