Covered retard forms

Details Covered retard forms Covered retard forms

A - Human Necessities

61

K

167/164

A61K 9/22 (2006.01) A61K 9/00 (2006.01)

Patent

CA 1331341

Covered retard form Abstract The invention relates to a covered, solid retard form which in the caseof oral administration remains in the stomach during periodic emptying and ensures continuous release. This dosage form contains the following components: a) at least one component that expands on contact with body fluid and that contains a physiologically active substance or a combination of such substances, b) at least one permeable hydrophilic membrane which surrounds compo- nent a) and which is expansible at the site of use, and optionally c) a covering which surrounds component a) and membrane b) and which disintegrates without delay under the action of body fluid at the site of use.

577621

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