04256108 is referenced by 450 patents and cites 4 patents.

An osmotic therapeutic system for delivering a drug is disclosed. The system comprises a drug delivery module which module comprises a rate controlling laminated wall surrounding a reservoir and has a portal for delivering drug from the system. The laminated wall comprises a semipermeable lamina in laminar arrangement with a microporous lamina to provide a wall that is permeable to an external fluid, impermeable to drug and maintains its integrity during the delivery of drug. The reservoir contains a drug, or a mixture of drug and a solute which drug or solute is soluble in the fluid and exhibits an osmotic pressure gradient across the wall against the fluid. In operation, drug is released from the system by fluid being imbibed through the wall into the reservoir at a rate determined by the permeability of the wall and the osmotic pressure gradient across the wall thereby producing a solution of drug, or a solution of solute containing drug which solution is released through the portal at a controlled rate over a prolonged period of time.

Title
Microporous-semipermeable laminated osmotic system
Application Number
785582
Publication Number
4256108
Application Date
May 21, 1979
Publication Date
March 17, 1981
Inventor
Felix Theeuwes
Los Altos
CA, US
Agent
Edward L Mandell
Thomas E Ciotti
Paul L Sabatine
Assignee
Alza Corporation
CA, US
IPC
A61M 7/00
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