Controlled release composition with semi-permeable membrane and poloxamer flux enhancer
First Claim
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1. A controlled release pharmaceutical tablet comprising:
- (a) a core comprising;
(i) a drug;
(ii) at least one pharmaceutically acceptable excipient;
(b) optionally a water soluble seal coat;
(c) a semipermeable membrane coating covering said core wherein the membrane comprises;
i) a material that is permeable to the passage of water and biological fluids and is impermeable to the passage of the drug; and
(ii) a poloxamer. (d) at least one passageway in the semipermeable membrane
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Abstract
A controlled release pharmaceutical tablet comprising a core containing the antihyperglycemic drug, a water soluble seal coat, a semipermeable membrane coating the core and at least one passageway in the membrane.
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Citations
18 Claims
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1. A controlled release pharmaceutical tablet comprising:
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(a) a core comprising;
(i) a drug;
(ii) at least one pharmaceutically acceptable excipient;
(b) optionally a water soluble seal coat;
(c) a semipermeable membrane coating covering said core wherein the membrane comprises;
i) a material that is permeable to the passage of water and biological fluids and is impermeable to the passage of the drug; and
(ii) a poloxamer. (d) at least one passageway in the semipermeable membrane - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15)
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16. A controlled release pharmaceutical tablet comprising:
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(a) a core consisting essentially of;
(i) a drug;
(ii) a binding agent;
(iii) optionally an absorption enhancer; and
(iv) optionally a lubricant;
(b) optionally a water soluble seal coat;
(c) a semipermeable membrane coating covering said core consisting essentially of;
(i) a water insoluble cellulose derivative; and
(ii) a flux enhancer;
(d) at least one passageway in the semipermeable membrane. - View Dependent Claims (10, 13)
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17. A controlled release antihyperglycemic tablet comprising:
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(a) a core consisting essentially of;
(i) metformin or a pharmaceutically acceptable salt thereof;
(ii) a water soluble binding agent; and
(iii) an absorption enhancer;
(b) optionally a water soluble seal coat;
(c) a semipermeable membrane coating covering said core comprising;
(i) cellulose acetate;
(ii) a poloxamer; and
(d) at least one passageway in the semipermeable membrane.
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18. A controlled release pharmaceutical tablet consisting essentially of:
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(a) a core comprising;
(i) 75-95% of an antihyperglycemic drug;
(ii) 3-15% of a binding agent; and
(iii) 2-15% of an absorption enhancer;
(b) a water soluble seal coat;
(c) a semipermeable membrane coating covering said core wherein the semipermeable membrane is permeable to the passage of water and biological fluids and is impermeable to the passage of the antihyperglycemic drug and comprises;
(i) 75-95% of a polymer;
(ii) 4-35% of a poloxamer; and
(d) at least one passageway in the semipermeable membrane for the release of the antihyperglycemic drug.
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Specification