Book excerpt: Metered Dose Inhaler Technology explores the technologies of pressurized metered dose inhalation (MDI) delivery systems and provides practical, easy-to-use guidance to effective product formulation. With contributions from an international panel of authors, the book addresses the global phase-out of chloroflurocarbon chemicals (CFCs), the generation of propellant systems to replace them, and their associated new medications and therapies. Topics include the manufacture of metered dose inhalers, particle size analysis in inhalation therapy, development and testing, pharmcokinetics and metabolism of propellants, toxicology, and more.