A membrane system for use in an extended release dosage form comprises an internal compartment (15) defined by the membrane system, an interior wall (16) surrounding the internal compartment, wherein the fluid permeability of the interior wall is responsive to osmolarity of an osmotic core (18) comprised in the internal compartment, and a fluid-permeable exterior wall (12) surrounding the interior wall.
A dosage form comprising a composition comprising a drug surrounded by an interior and an exterior wall with an exit for administering the drug to a patient; and a method of using the dosage form are disclosed for an indicated therapy.
COMPOSITION COMPRISING MORPHINE, POLYPYRROLIDONE AND A POLYALKYLENEOXIDE
申请人:ALZA CORPORATION
公开号:EP0767663B1
公开(公告)日:2002-04-03
EXTENDED RELEASE DOSAGE FORM
申请人:ALZA CORPORATION
公开号:EP1059916B1
公开(公告)日:2005-11-02
Extended Release Dosage Form
申请人:Edgren E. David
公开号:US20070128279A1
公开(公告)日:2007-06-07
A membrane system comprising an interior wall, a fluid-permeable exterior wall surrounding the interior wall and an internal compartment defined by the membrane system, wherein fluid permeability of the interior wall is responsive to osmolarity of an osmotic core within the internal compartment are disclosed. A controlled release dosage form comprising the membrane system and a process for delivering an osmotically active formulation from an osmotic pump over an extended period of time are also disclosed.