Controlled release oral dosage form

• US 20050147678A1
• Filed: 03/01/2005
• Published: 07/07/2005
• Est. Priority Date: 02/26/1999
• Status: Active Grant

• Current Assignee: Avinash Nangia, Boyong Li, Chih Ming Chen, Xiu Xiu Cheng
• Original Assignee: Avinash Nangia, Boyong Li, Chih Ming Chen, Xiu Xiu Cheng
• Inventors: Nangia, Avinash, Chen, Chih Ming, Cheng, Xiu Xiu, Li, Boyong
• Granted Patent: US 7,771,750 B2
• Time in Patent Office: Days
• US Class Current: 424/472
• CPC Class Codes: A61K 31/137 Arylalkylamines, e.g. amphetamine, epinephrine, salbutamol, ephedrine or methadone
• CPC Class Codes: A61K 9/1676 having a drug-free core with discrete complete coating layer containing drug adsorbates of liquid drug formulations on inert powders without simultaneous granulation step A61K9/141; with further drug-free outer coating A61K9/5078; drug conjugated to non-active particles A61K47/6921
• CPC Class Codes: A61K 9/2081 with microcapsules or coated microparticles according to A61K9/50
• CPC Class Codes: A61K 9/5078 with drug-free core
• CPC Class Codes: A61K 9/5084 Mixtures of one or more drugs in different galenical forms, at least one of which being granules, microcapsules or (coated) microparticles according to A61K9/16 or A61K9/50, e.g. for obtaining a specific release pattern or for combining different drugs tablets containing such a mixture A61K9/2077
• CPC Class Codes: A61P 25/34 Tobacco-abuse

Abstract

A once a day bupropion hydrochloride formulation is disclosed.

Claims

1. A pelletized composition comprising:

a core which comprises

(a) an inert carrier, having

(b) at least one aminoketone antidepressant layered thereon.

2. The composition of claim 1 wherein said core further comprises at least one binder.

3. The composition of claim 2 wherein said binder comprises hydroxypropyl methylcellulose.

4. The composition of claim 1 further comprising at least one polymer for controlled release delivery of said aminoketone antidepressant.

5. The composition of claim 4 wherein said polymer is selected from the group consisting of shellac, methacrylic acid copolymers, hydroxypropyl cellulose, hydroxypropyl methylcellulose, ethyl cellulose, cellulose aceate, cellulose acetate butyrate, cellulose acetate phthalate, hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate succinate, cellulose acetate trimellitate, polyvinyl acetate phthalate and mixtures thereof.

6. The composition of claim 4 wherein said polymer is water insoluble.

7. The composition of claim 6 wherein said water insoluble polymer comprises a methacrylic acid copolymer.

8. The composition of claim 6 wherein said water insoluble polymer comprises ethylcellulose.

9. The composition of claim 4 wherein said polymer is insoluble below about pH 7.

10. The composition of claim 4 wherein said composition has a coating comprising a polymer.

11. A pelletized dosage form comprising at least one composition of claim 1.

12. The dosage form of claim 11 wherein said composition further comprises at least one binder.

13. The dosage form of claim 12 wherein said binder is hydroxypropyl methylcellulose.

14. The dosage form of claim 11 further comprising at least one polymer for controlled release delivery.

15. The dosage form of claim 14 wherein said polymer is selected from the group consisting of shellac, methacrylic acid copolymers, hydroxypropyl cellulose, hydroxypropyl methylcellulose, ethylcellulose, cellulose acetate, cellulose acetate butyrate, cellulose acetate phthalate, hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate succinate, cellulose acetate trimellitate, polyvinyl acetate phthalate and mixtures thereof.

16. The dosage form of claim 15 wherein said polymer is water insoluble.

17. The dosage form of claim 16 wherein said water insoluble polymer comprises ethylcellulose.

18. The dosage form of claim 14 wherein said polymer is insoluble below about pH 7.

19. The dosage form of claim 14 wherein said dosage form is for once daily administration.

20. The dosage form of claim 11 wherein said dosage form is a tablet, caplet, capsule or palletized tablet.

21. The dosage form of claim 11 comprising at least two distinct compositions of claim 1.

22. The dosage form of claim 21 wherein at least one distinct composition is for controlled release.

31. A dosage form of claim 11, said dosage form comprising a first pellet having a coating comprising methacrylic acid copolymer and a second pellet having a coating comprising methacrylic acid copolymer.

32. The dosage form of claim 31 wherein said methacrylic acid copolymer of said first pellet is pH independent.

33. The dosage form of claim 31 wherein said methacrylic acid copolymer of said second pellet is pH independent.

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