Controlled release means

Details Controlled release means Controlled release means

1988-07-19

1990-12-04

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

424494, A61K 922

Patent

active

049752847

ABSTRACT:
A controlled release means comprisng a core of at least one water-soluble ingredient of which at least one ingredient is to be released in a controlled manner, said core being surrounded by a semi-permeable membrane coating containing dispersed water-soluble pore-forming particles in sufficient amount to give rise to dissolution upon exposure to an aqueous environment to form only one or two pores extending through the coating to provide communication between the core and the exterior of the coating and a method of making the same.

REFERENCES:
patent: 4684524 (1987-08-01), Eckenhoff et al.
patent: 4685918 (1987-08-01), Amidon et al.
patent: 4687660 (1987-08-01), Baker et al.
patent: 4801461 (1989-01-01), Hamel et al.

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