초록

An osmotic device is disclosed comprising a semipermeable wall surrounding a compartment housing an agent that is insoluble to very soluble in aqueous and biological fluids, and a layer of a fluid swellable, hydrogel. A passageway in the wall connects the agent with the exterior of the device.

대표청구항 ▼

An osmotic device for the controlled delivery of a beneficial agent to a fluid environment of use, comprising: a. a wall formed of a semipermeable material permeable to the passage of an exterior aqueous fluid present in environment of use and substantially impermeable to the passage of beneficial a

An osmotic device for the controlled delivery of a beneficial agent to a fluid environment of use, comprising: a. a wall formed of a semipermeable material permeable to the passage of an exterior aqueous fluid present in environment of use and substantially impermeable to the passage of beneficial agent, the semipermeable wall surrounding and forming; b. a compartment containing a layer of beneficial agent, that is insoluble to very soluble in the aqueous fluid and a layer of an expandable hydrogel; and, c. a passageway in the semipermeable wall communicating with the layer of beneficial agent in the compartment and with the exterior of the device.