| 摘要 |
Compositions, methods and systems are provided for pulmonary delivery of long-acting muscarinic antagonists and long-acting &bgr;2 adrenergic receptor agonists via a metered dose inhaler. In particular embodiments, the compositions include a suspension medium, active agent particles, and suspending particles, in which the active agent particles and suspending particles form a co-suspension within the suspension medium. |
