Modified release formulations containing drug—ion exchange resin complexes
First Claim
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1. An aqueous pharmaceutical liquid suspension suitable for oral ingestion comprising:
- (i) a particulate drug-ion exchange resin complex-matrix comprising a pharmaceutically acceptable drug which is carbinoxamine bound to a pharmaceutically acceptable water insoluble ion exchange resin to form said particulate drug-ion exchange resin complex, said particulate drug-ion exchange resin complex being in a matrix with a water insoluble polymer or copolymer or a hydrophilic polymer, which polymer or copolymer is present in an amount of about 3% to about 30% by weight, based on the weight of said particulate drug-ion exchange resin complex-matrix, said ion exchange resin being a cation exchange resin, and(ii) a cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric diffusion modified release barrier coating over said particulate drug-ion exchange resin complex defined in (i), said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release, diffusion barrier coating applied as an aqueous dispersion, wherein said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating comprises;
(a) about 75% w/w to about 90% w/w polyvinylacetate polymer;
(b) a stabilizer comprising polyvinylpyrrolidone, and(c) about 2.5% w/w to about 20% w/w of plasticizer effective to enhance the tensile strength of said cured, high tensile strength, water permeable, water insoluble, non- ionic polymeric, modified release diffusion barrier coating, whereby said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release, diffusion barrier coating is over the particulate drug-ion exchange resin complex-matrix and provides a modified release profile to said pharmaceutically acceptable drug in said particulate drug- ion exchange resin complex-matrix.
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Abstract
An aqueous liquid suspension containing a coated drug-ion exchange resin complex comprising a core composed of an amphetamine complexed with a pharmaceutically acceptable ion-exchange resin and an uncoated amphetamine-ion exchange resin complex is provided. The coated amphetamine-ion exchange resin complex is in admixture with a polymer to form a matrix. Methods of making the coated complex and the liquid suspension are described.
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Citations
19 Claims
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1. An aqueous pharmaceutical liquid suspension suitable for oral ingestion comprising:
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(i) a particulate drug-ion exchange resin complex-matrix comprising a pharmaceutically acceptable drug which is carbinoxamine bound to a pharmaceutically acceptable water insoluble ion exchange resin to form said particulate drug-ion exchange resin complex, said particulate drug-ion exchange resin complex being in a matrix with a water insoluble polymer or copolymer or a hydrophilic polymer, which polymer or copolymer is present in an amount of about 3% to about 30% by weight, based on the weight of said particulate drug-ion exchange resin complex-matrix, said ion exchange resin being a cation exchange resin, and (ii) a cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric diffusion modified release barrier coating over said particulate drug-ion exchange resin complex defined in (i), said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release, diffusion barrier coating applied as an aqueous dispersion, wherein said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating comprises; (a) about 75% w/w to about 90% w/w polyvinylacetate polymer; (b) a stabilizer comprising polyvinylpyrrolidone, and (c) about 2.5% w/w to about 20% w/w of plasticizer effective to enhance the tensile strength of said cured, high tensile strength, water permeable, water insoluble, non- ionic polymeric, modified release diffusion barrier coating, whereby said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release, diffusion barrier coating is over the particulate drug-ion exchange resin complex-matrix and provides a modified release profile to said pharmaceutically acceptable drug in said particulate drug- ion exchange resin complex-matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An aqueous pharmaceutical liquid suspension suitable for oral ingestion comprising:
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(i) a particulate carbinoxamine-cation exchange resin complex comprising carbinoxamine bound to a pharmaceutically acceptable water insoluble cation exchange resin to form said particulate carbinoxamine-cation exchange resin complex, said particulate carbinoxamine-cation exchange resin complex optionally being in a matrix with a water insoluble polymer or copolymer or a hydrophilic polymer, and (ii) a cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating over said particulate carbinoxamine-cation exchange resin complex-optional matrix defined in (i), said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating applied as an aqueous dispersion, wherein said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating comprises; (a) about 75% w/w to about 90% w/w polyvinylacetate polymer; and (b) a stabilizer comprising polyvinylpyrrolidone, and (c) about 2.5% w/w to about 20% w/w of plasticizer effective to enhance the tensile strength of said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating, whereby said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating is over the particulate carbinoxamine-cation exchange resin complex-optional matrix and provides a modified release profile to said pharmaceutically acceptable drug in said particulate carbinoxamine-cation exchange resin complex-optional matrix. - View Dependent Claims (16, 17)
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18. An aqueous pharmaceutical liquid suspension suitable for oral ingestion comprising:
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(i) a particulate carbinoxamine-cation exchange resin complex-matrix comprising carbinoxamine bound to a pharmaceutically acceptable water insoluble cation exchange resin to form said particulate carbinoxamine-cation exchange resin complex-matrix, wherein the matrix comprises the particulate carbinoxamine-cation exchange resin complex and a polymer or copolymer in an amount of about 3% to about 30% of the particulate carbinoxamine-cation exchange resin complex-matrix; and (ii) about 25% w/w to about 50% w/w cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating over said particulate carbinoxamine-cation exchange resin complex defined in (i), said cured, high tensile strength, water permeable, water insoluble, non-ionic polymeric, modified release diffusion barrier coating over the particulate carbinoxamine-cation exchange resin complex-matrix and provides a modified release profile to said pharmaceutically acceptable drug in said particulate carbinoxamine-cation exchange resin complex-matrix. - View Dependent Claims (19)
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Specification