Osmotic delivery system
First Claim
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1. An osmotic pharmaceutical tablet comprising (a) a single-layer compressed core comprising (i) a non-ripening drug having a solubility per dose less than about 1 mL−
- 1, (ii) a polyethyleneoxide having a weight-average, molecular weight from about 200,000 to about 7,000,000, and (iii) an osmagent, wherein said polyethyleneoxide is present in said core from about 2.0% to about 35% by weight and said osmagent is present from about 15% to about 70% by weight;
(b) a water-permeable layer surrounding said core; and
(c) at least one passageway within said layer (b) for delivering said drug to a fluid environment surrounding said tablet.
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Abstract
An osmotic pharmaceutical tablet is described which comprises a single-layer compressed core surrounded by a water permeable layer having a passageway. The single-layer core contains (i) a non-ripening drug having a solubility per dose less than about 1 mL−1, (ii) about 2.0% to about 30% by weight of a polyethyleneoxide having a weight-average, molecular weight from about 200,000 to about 7,000,000, (iii) an osmagent, and (iv) an optional disintegrant.
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22 Claims
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1. An osmotic pharmaceutical tablet comprising
(a) a single-layer compressed core comprising (i) a non-ripening drug having a solubility per dose less than about 1 mL− - 1,
(ii) a polyethyleneoxide having a weight-average, molecular weight from about 200,000 to about 7,000,000, and (iii) an osmagent, wherein said polyethyleneoxide is present in said core from about 2.0% to about 35% by weight and said osmagent is present from about 15% to about 70% by weight;
(b) a water-permeable layer surrounding said core; and
(c) at least one passageway within said layer (b) for delivering said drug to a fluid environment surrounding said tablet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An osmotic pharmaceutical tablet comprising
(a) a single-layer compressed core consisting essentially of (i) a non-ripening drug having a solubility per dose less than about 1 mL− - 1,
(ii) a polyethyleneoxide having a weight-average, molecular weight from about 200,000 to about 7,000,000, (iii) an osmagent, (iv) an optional bioavailability enhancing additive, and (v) an optional pharmaceutically acceptable excipient, carrier or diluent, wherein said polyethyleneoxide is present in said core from about 2.0% to about 35% by weight and said osmagent is present from about 15% to about 70% by weight;
(b) a water-permeable layer surrounding said core; and
(c) at least one passageway within said layer (b) for delivering said drug to a fluid environment surrounding said tablet.
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Specification