The present invention is related to metered dose inhalation formulas andmanufacturing process. The active pharmaceutical ingredient can be beta-2agonists, corticosteroids, or a combination thereof. The inhalation formulasare homogenized suspensions with hydrofluoroalkane (HFA) propellant,minimal amount of ethanol and polyetheleneglycol (PEG) as suspending andparticle size modifying agents.