Melt-extrusion multiparticulates
First Claim
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1. A unit dose sustained-release oral dosage form comprising a plurality of extruded particles, each of said particles comprising:
- an opioid analgesic dispersed in a matrix comprising one or more hydrophobic materials selected from the group consisting of acrylic polymers and alkylcelluloses;
said particles being non-spheroidal and having a size from about 0.1 mm to about 12 mm and a diameter from about 0.1 mm to about 5 mm, said unit dose providing a release of said opioid analgesic over at least about 6 hours, said particles being formed by mixing the opioid analgesic and the one or more hydrophobic materials in an extruder to form said matrix, extruding the matrix in the extruder to form strands, and cutting said strands into said extruded particles.
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Abstract
A unit dose sustained-release oral dosage form containing a plurality of melt-extruded particles, each consisting essentially of a therapeutically active agent, one or more retardants, and an optional water-insoluble binder is disclosed. The particles have a length of from about 0.1 to about 12 mm and can be of varying diameters and each unit dose provides a release of therapeutically active agents over at least about 8 hours. Methods of preparing the unit doses as well as extrusion processes and methods of treatment are also disclosed.
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Citations
43 Claims
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1. A unit dose sustained-release oral dosage form comprising a plurality of extruded particles, each of said particles comprising:
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an opioid analgesic dispersed in a matrix comprising one or more hydrophobic materials selected from the group consisting of acrylic polymers and alkylcelluloses;
said particles being non-spheroidal and having a size from about 0.1 mm to about 12 mm and a diameter from about 0.1 mm to about 5 mm, said unit dose providing a release of said opioid analgesic over at least about 6 hours, said particles being formed by mixing the opioid analgesic and the one or more hydrophobic materials in an extruder to form said matrix, extruding the matrix in the extruder to form strands, and cutting said strands into said extruded particles. - View Dependent Claims (3, 4, 5, 6, 7, 9, 10, 11, 13, 14, 18, 38)
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2. A method of treating a patient with a sustained release multiparticulate formulation of a therapeutically active agent, comprising:
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(a) mixing together an opioid analgesic, and a hydrophobic material in an extruder to obtain a homogeneous mixture, the ratio of said hydrophobic material to said opioid analgesic in said mixture being sufficient to impart a release of said opioid analgesic from said particles over a time period of at least about 4 hours when said particle is exposed to an aqueous fluid;
(b) heating said homogeneous mixture in the extruder;
(c) extruding said homogeneous mixture with the extruder to thereby form strands;
(d) cooling said strands containing said homogeneous mixture; and
(e) cutting said strands into particles having a size from about 0.1 mm to about 12 mm; and
(f) dividing said particles into unit doses; and
administering said unit dose to a patient.- View Dependent Claims (30, 31, 40)
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8. A method of preparing a multiparticulate sustained release oral dosage form, comprising:
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(a) directly metering into an extruder a hydrophobic material and an opioid analgesic;
(b) heating said homogeneous mixture in the extruder;
(c) extruding said homogeneous mixture with the extruder to thereby form strands;
(d) cooling said strands containing said homogeneous mixture; and
(e) cutting said strands into particles having a size of from about 0.1 mm to about 12 mm; and
(f) dividing said particles into unit doses. - View Dependent Claims (32, 33, 41)
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12. An opioid unit dose sustained-release oral dosage form having substantially no feeding-fasting effect, comprising a plurality of extruded particles, each of said particles comprising:
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an opioid analgesic dispersed in a matrix comprising;
one or more hydrophobic materials selected from the group consisting of acrylic polymers and alkylcelluloses;
said particles having a size from about 0.1 mm to about 12 mm and a diameter of from about 0.1 mm to about 3 mm, said unit dose providing a release of said opioid analgesic over at least about 12-24 hours, said particles being formed by mixing the opioid analgesic and the one or more hydrophobic materials in an extruder to form said matrix, extruding the matrix in the extruder to form strands, and cutting said strands into said extruded particles. - View Dependent Claims (34, 35, 42)
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15. A method of preparing a multiparticulate sustained release oral dosage form, comprising:
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(a) mixing together an opioid analgesic and one or more hydrophobic materials in an extruder to obtain a homogeneous mixture, the ratio of said one or more hydrophobic materials to said opioid analgesic in said mixture being sufficient to impart a release of said opioid analgesic from said particles over a time period of at least about 4 hours when said particle is exposed to an aqueous fluid;
(b) heating said homogeneous mixture in the extruder;
(c) extruding said homogeneous mixture with the extruder to thereby form strands;
(d) cooling said strands containing said homogeneous mixture; and
(e) cutting said strands into particles having a size from about 0.1 mm to about 12 mm; and
(f) dividing said particles into unit doses. - View Dependent Claims (16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 39)
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29. An opioid unit dose sustained-release oral dosage form having substantially no feeding-fasting effect, comprising a plurality of extruded particles, each of said particles comprising:
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an opioid analgesic dispersed in a matrix;
one or more hydrophobic materials selected from the group consisting of acrylic polymers. alkylcelluloses;
said particles having a size from about 0.1 mm to about 12 mm and a diameter of from about 0.1 mm to about 3 mm, said unit dose providing a release of said opioid analgesic over at least about 6 hours said particles being formed by mixing the opioid analgesic, and the one or more hydrophobic materials in an extruder to form said matrix, extruding the matrix in the extruder to form strands, and cutting said strands into said extruded particles. - View Dependent Claims (36, 37, 43)
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Specification