Modified release formulations containing drug-ion exchange resin complexes
First Claim
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1. An orally ingestible composition comprising:
- (A) barrier coated particulates which provide about a twelve hour release profile which comprise;
(i) a particulate drug-cation exchange resin complex-matrix comprising at least one drug bound to a pharmaceutically acceptable water insoluble cation exchange resin, and further comprising a water insoluble polymer or copolymer, or hydrophilic polymer, said particulate drug-cation exchange resin complex-(water insoluble polymer or copolymer or a hydrophilic polymer) matrix being capable of passing through a number 40 mesh screen, and(ii) a high tensile strength, water permeable, water insoluble, non ionic polymeric diffusion barrier coating which provides about a twelve hour release profile to the drug in said drug-cation exchange resin complex-(water insoluble polymer or copolymer or hydrophilic polymer) matrix, said barrier coating having an elongation factor of about 125% to about 400%, wherein said at least one drug in part (A) is amphetamine or dextro-amphetamine; and
(B) at least one additional component selected from the group consisting of at least one of (iiia) an uncoated particulate dextro-amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated dextro-amphetamine-cation exchange resin complex is dextro-amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiib) an uncoated particulate amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated amphetamine-cation exchange resin complex is amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiic) amphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin, or (iiid) dextroamphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin.
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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
30 Claims
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1. An orally ingestible composition comprising:
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(A) barrier coated particulates which provide about a twelve hour release profile which comprise; (i) a particulate drug-cation exchange resin complex-matrix comprising at least one drug bound to a pharmaceutically acceptable water insoluble cation exchange resin, and further comprising a water insoluble polymer or copolymer, or hydrophilic polymer, said particulate drug-cation exchange resin complex-(water insoluble polymer or copolymer or a hydrophilic polymer) matrix being capable of passing through a number 40 mesh screen, and (ii) a high tensile strength, water permeable, water insoluble, non ionic polymeric diffusion barrier coating which provides about a twelve hour release profile to the drug in said drug-cation exchange resin complex-(water insoluble polymer or copolymer or hydrophilic polymer) matrix, said barrier coating having an elongation factor of about 125% to about 400%, wherein said at least one drug in part (A) is amphetamine or dextro-amphetamine; and (B) at least one additional component selected from the group consisting of at least one of (iiia) an uncoated particulate dextro-amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated dextro-amphetamine-cation exchange resin complex is dextro-amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiib) an uncoated particulate amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated amphetamine-cation exchange resin complex is amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiic) amphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin, or (iiid) dextroamphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An orally ingestible aqueous liquid suspension comprising:
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(A) barrier coated particulates which provide about a twelve hour release profile which comprise; (i) a particulate drug-cation exchange resin complex-matrix comprising at least one drug bound to a pharmaceutically acceptable water insoluble cation exchange resin, and further comprising a water insoluble polymer or copolymer, or hydrophilic polymer, said particulate drug-cation exchange resin complex-(water insoluble polymer or copolymer or a hydrophilic polymer) being capable of passing through a number 40 mesh screen, and (ii) a high tensile strength, water permeable, water insoluble, non ionic polymeric diffusion barrier coating which provides about a twelve hour release profile to the drug in said drug-cation exchange resin complex-(water insoluble polymer or copolymer or hydrophilic polymer) matrix, said barrier coating having an elongation factor of about 125% to about 400%, wherein said at least one drug of part (A) is amphetamine or dextroamphetamine; and (B) at least one additional component selected from the group consisting of at least one of (iiia) an uncoated particulate dextro-amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated dextro-amphetamine-cation exchange resin complex is dextro-amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiib) an uncoated particulate amphetamine-cation exchange resin complex of a size capable of passing through a number 40 mesh screen, wherein said uncoated amphetamine-cation exchange resin complex is amphetamine bound to a pharmaceutically acceptable water insoluble cation exchange resin, (iiic) amphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin, or (iiid) dextroamphetamine or a pharmaceutically acceptable salt thereof which is not complexed with an ion exchange resin; and (C) a pharmaceutically acceptable aqueous suspension base, wherein said barrier coated drug-cation exchange resin complex and water insoluble polymer or copolymer or said hydrophilic polymer particulate defined in (A) and said at least one additional component defined in (B) are suspended in said base. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification