Pharmaceutical dosage form with multiple enteric polymer coatings for colonic delivery
First Claim
1. A pharmaceutical composition in a unit dosage form for peroral administration in a human or lower animal, having a gastrointestinal tract comprising a small intestine and a colon with a lumen therethrough having an inlet to the colon from the small intestine, comprising:
- a. a safe and effective amount of a therapeutically active agent incorporated into a compressed, bi-convex tablet, with a maximum diameter of about 4 mm to about 10 mm;
b. a non-pH dependent smoothing coat applied to the tablet to provide a smooth tablet surface free from edges or sharp curves; and
c. an enteric polymer coating material comprising at least one inner coating layer and only one outer coating layer;
wherein the therapeutically active agent is released at a point near the inlet to, or within the colon;
each of the inner coating layer(s) is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 5 to about 6.3; and
the outer coating layer is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 6.8 to about 7.2.
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Accused Products
Abstract
The present invention relates to a pharmaceutical composition in a unit dosage form for peroral administration in a human or lower animal, having a gastrointestinal tract comprising a small intestine and a colon with a lumen therethrough having an inlet to the colon from the small intestine, comprising:
a. a safe and effective amount of a therapeutically active agent incorporated into a compressed, bi-convex tablet, with a maximum diameter of about 4 mm to about 10 mm;
b. a non-pH dependent smoothing coat applied to the tablet to provide a smooth tablet surface free from edges or sharp curves; and
c. an enteric polymer coating material comprising at least one inner coating layer and only one outer coating layer;
wherein the therapeutically active agent is released at a point near the inlet to, or within the colon; each of the inner coating layer(s) is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 5 to about 6.3; and the outer coating layer is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 6.8 to about 7.2.
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Citations
17 Claims
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1. A pharmaceutical composition in a unit dosage form for peroral administration in a human or lower animal, having a gastrointestinal tract comprising a small intestine and a colon with a lumen therethrough having an inlet to the colon from the small intestine, comprising:
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a. a safe and effective amount of a therapeutically active agent incorporated into a compressed, bi-convex tablet, with a maximum diameter of about 4 mm to about 10 mm; b. a non-pH dependent smoothing coat applied to the tablet to provide a smooth tablet surface free from edges or sharp curves; and c. an enteric polymer coating material comprising at least one inner coating layer and only one outer coating layer; wherein the therapeutically active agent is released at a point near the inlet to, or within the colon;
each of the inner coating layer(s) is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 5 to about 6.3; and
the outer coating layer is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 6.8 to about 7.2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17)
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13. The composition ofeclaim 9 wherein the inner coating, layer is poly(methacrylic acid, methyl methacrylate) 1:
- 1, which has a coating, thickness of about 90 μ
m to about 250 μ
m when the diameter is about 7 mm.
- 1, which has a coating, thickness of about 90 μ
Specification