Surgery – Controlled release therapeutic device or system – Osmotic or diffusion pumped device or system
Patent
1984-10-26
1986-12-09
Williams, Howard S.
Surgery
Controlled release therapeutic device or system
Osmotic or diffusion pumped device or system
428508, A61K 922, A61K 924
Patent
active
046278516
ABSTRACT:
An osmotic device is disclosed for delivering a drug to the colon. The device comprises a laminated wall surrounding a compartment containing a drug with a passageway through the wall for dispensing the drug from the device. The laminated wall comprises three laminae, an inner semipermeable lamina, a middle lamina containing a salt of a fatty acid and an outer enteric lamina.
REFERENCES:
patent: 4008719 (1977-02-01), Theeuwes et al.
patent: 4331728 (1982-05-01), Theeuwes
Theeuwes Felix
Wong Patrick S.-L.
ALZA Corporation
Mandell Edward L.
Sabatine Paul L.
Stone Steven F.
Williams Howard S.
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