IP Library Granted Patent US 8,168,217
Granted Patent B2
US 8,168,217 · App. 11/888,652 · Granted May 1, 2012

Oral drug delivery system

Assignee: Durect Corporation
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Quick Facts
Patent No.
US 8,168,217
App. No.
11/888,652
Granted
May 1, 2012
Kind
B2
Abstract

Dosage forms and drug delivery devices suitable for administration of pharmaceutical compounds and compositions, including the oral drug administration of compounds.

Claims (33)

1. An oral formulation comprising:

oxycodone;

sucrose acetate isobutyrate (SAIB);

a cellulose acetate butyrate (CAB) having a number average molecular weight ranging from 66,000 Daltons to 83,000 Daltons;

isopropyl myristate (IPM); and

a solvent selected from the group consisting of triacetin and ethyl lactate (EL).

2. The oral formulation of claim 1 , wherein the solvent is triacetin.

3. The oral formulation of claim 1 , wherein the CAB has a butyryl content ranging from about 17% to about 38%.

4. The oral formulation of claim 1 , wherein the CAB has an acetyl content ranging from about 13% to about 30%.

5. The oral formulation of claim 1 , wherein the CAB has a hydroxyl content ranging from about 0.8% to about 1.7%.

6. The oral formulation of claim 1 , wherein the CAB has a butyryl content ranging from about 17% to about 38%, an acetyl content ranging from about 13% to about 30%, and a hydroxyl content ranging from about 0.8% to about 1.7%.

7. The oral formulation of claim 1 , wherein the formulation comprises from about 1 to about 8.6 weight percent of the CAB.

8. The oral formulation of claim 1 , wherein the formulation comprises from about 20 to about 50 weight percent of the solvent.

9. The oral formulation of claim 1 , wherein the formulation comprises from about 1 to about 75 weight percent IPM.

10. An oral dosage form comprising the formulation of claim 1 , wherein the formulation is contained in a capsule.

11. The oral dosage form of claim 10 , wherein the capsule comprises gelatin or hydroxyl propylmethyl cellulose.

12. The oral dosage form of claim 10 , wherein the capsule is a hard capsule comprising gelatin or hydroxyl propylmethyl cellulose.

13. The oral formulation of claim 1 , wherein the formulation comprises:

from about 1 to about 8.6 weight percent of the CAB;

from about 20 to about 50 weight percent of the solvent; and

from about 1 to about 75 weight percent IPM.

14. The oral formulation of claim 13 , wherein the formulation comprises from 3 to 7.8 weight percent of the CAB.

15. The oral formulation of claim 14 , wherein the CAB has a butyryl content ranging from about 17% to about 38%.

16. The oral formulation of claim 14 , wherein the CAB has an acetyl content ranging from about 13% to about 30%.

17. The oral formulation of claim 14 , wherein the CAB has a hydroxyl content ranging from about 0.8% to about 1.7%.

18. The oral formulation of claim 14 , wherein the CAB has a butyryl content ranging from about 17% to about 38%, an acetyl content ranging from about 13% to about 30%, and a hydroxyl content ranging from about 0.8% to about 1.7%.

19. An oral dosage form comprising the formulation of claim 14 , wherein the formulation is contained in a capsule.

20. The oral dosage form of claim 19 , wherein the capsule comprises gelatin or hydroxyl propylmethyl cellulose.

21. The oral dosage form of claim 19 , wherein the capsule is a hard capsule comprising gelatin or hydroxyl propylmethyl cellulose.

22. A method of providing pain relief to a subject in need thereof, the method comprising:

orally administering to the subject an effective amount of the oral dosage form of claim 13 .

23. A method of providing pain relief to a subject in need thereof, the method comprising:

orally administering to the subject an effective amount of the oral formulation of claim 1 .

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 17, 2014
From: FU, ROGER; ZAMLOOT, MICHAEL S.
To: PAIN THERAPEUTICS, INC.
Reel/Frame 034531/0738 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 17, 2014
From: PAIN THERAPEUTICS, INC.
To: DURECT CORPORATION
Reel/Frame 034531/0762 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 23, 2010
From: YUM, SU IL; SCHOENHARD, GRANT; TIPTON, ARTHUR J.; GIBSON, JOHN W.; MIDDLETON, JOHN C.
To: DURECT CORPORATION
Reel/Frame 025564/0987 →
Continuity (4)
Continuation 10737144 · Dec 15, 2003
Provisional Application 60433116 · Dec 13, 2002
Provisional Application 60517464 · Nov 4, 2003
Related Publication 20080206321A1 · Aug 28, 2008