Dispensing device containing a hydrophobic medium

A device for controlled delivery of a beneficial agent to an aqueous containing environment, said device comprising:

• a shaped wall having a thickness of at least 100.mu.m that surrounds and defines an internal reservoir;
• said wall at least in part permeable to the aqueous environment and said wall formed at least in part of a sintered polymer microporous membrane permeable to a beneficial agent-containing hydrophobic medium when the wall is present in the aqueous containing environment, said sintered polymer impregnated with hydrogel and wetted with a low vapor pressure hydrophobic medium;
• and said reservoir containing a mixture of a hydrophilic swellable composition and said beneficial agent-containing hydrophobic medium, said beneficial agent being insoluble or partially insoluble in said aqueous containing environment.

A device for controlled delivery of a beneficial agent to an aqueous containing environment, said device comprising:

• a shaped wall having a thickness of at least 100.mu.m that surrounds and defines an internal reservoir;
• said wall at least in part permeable to the aqueous environment and said wall formed at least in part of a sintered polymer microporous membrane, said sintered polymer impregnated with a hydrophilic hydrogel wetted with a hydrophilic medium and at least one hole provided therethrough;
• and said reservoir containing a mixture of a hydrophilic swellable composition and said beneficial agent-containing hydrophobic medium, said beneficial agent being insoluble or partially insoluble in said aqueous containing environment.

A device for controlled delivery of a beneficial agent to an aqueous containing environment, said device comprising:

• a shaped wall having a thickness of at least 100.mu.m that surrounds and defines an internal reservoir;
• said wall at least in part permeable to the aqueous environment and said wall formed at least in part of a material permeable to a beneficial agent-containing hydrophobic medium when the wall is present in the aqueous containing environment and said wall formed at least in part of a sintered polymer microporous membrane permeable to the aqueous containing environment, said sintered polymer impregnated with a low vapor pressure hydrophilic medium;
• and said reservoir containing a mixture of a hydrophilic swellable composition and said beneficial agent-containing hydrophobic medium, said beneficial agent being insoluble or partially insoluble in said aqueous containing environment.

A device for controlled delivery of a beneficial agent to an aqueous containing environment, said device comprising:

• a shaped wall having a thickness of at least 100.mu.m that surrounds and defines an internal reservoir;
• said wall at least in part permeable to the aqueous environment and said wall formed at least in part of a material permeable to a beneficial agent-containing hydrophobic medium when the wall is present in the aqueous containing environment and said wall formed at least in part of a sintered polymer microporous membrane permeable to the aqueous containing environment, said sintered polymer impregnated with a hydrogel and wetted with a low vapor pressure hydrophilic medium;
• and said reservoir containing a mixture of a hydrophilic swellable composition and said beneficial agent-containing hydrophobic medium, said beneficial agent being insoluble or partially insoluble in said aqueous containing environment.

A device for controlled delivery of a beneficial agent to an aqueous containing environment, said device comprising:

• a shaped wall having a thickness of at least 100 .mu.m that surrounds and defines an internal reservoir;
• said wall at least in part permeable to the aqueous environment and said wall formed at least in part of a material permeable to a beneficial agent-containing hydrophobic medium when the wall is present in the aqueous containing environment;
• and said reservoir containing sufficient air to achieve a predetermined time lag release and a mixture of a hydrophilic swellable composition and said beneficial agent-containing hydrophobic medium, said beneficial agent being insoluble or partially insoluble in said aqueous containing environment.