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Claims for Patent: 7,838,027

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Claims for Patent: 7,838,027

Title:Pantoprazole multiparticulate formulations
Abstract:Pantoprazole sodium multiparticulates are described which avoid sticking to nasogastric and gastronomy tubes. The pantoprazole multiparticulates have a spheroid core of pantoprazole or an enantiomer thereof, or a salt thereof, a surfactant, and a disintegrant; a sub coat which is comprised of hydroxypropyl methylcellulose (hypromellose) and water, an enteric coat on the sub-coat, and a final seal coat over the enteric coat, which is composed of hydroxypropyl methylcellulose (hypromellose) and water.
Inventor(s): Venkata Ramana Rao; Sripriya (Iselin, NJ), Shah; Syed M. (East Hanover, NJ), Tatapudy; Hanumantharao (Suffern, NY), Saunders; Richard William (Palisades, NY), Fawzi; Mahdi (Morristown, NJ), Nagi; Arwinder (Thiells, NY), Singh; Shailesh (Bardonia, NY), Hasan; Sumon A. (Monroe, NY)
Assignee: Wyeth LLC (Madison, NJ)
Application Number:10/574,210
Patent Claims: 1. Pantoprazole multiparticulates having reduced release under gastric conditions and fast release at neutral pH, wherein each of said multiparticulates comprises: a spheroid core comprising about 20% w/w to about 45% w/w of a pantoprazole salt or a hydrate thereof, as the sole active component in the multiparticulate and about 25% to about 30% w/w microcrystalline cellulose, about 4% to about 6% w/w polysorbate 80, about 14% to about 16% w/w crospovidone, about 0.5 to about 2% w/w hydroxypropyl methylcellulose, about 5% to about 8% w/w sodium carbonate, and about 1 to about 2% w/w water; an initial seal coat comprising hydroxypropylmethyl cellulose on the spheroid core; and an enteric coat on the initial seal coat, wherein said multiparticulates have an average diameter of about 0.7 mm to about 1.25 mm.

2. The multiparticulates according to claim 1, wherein the pantoprazole salt is selected from pantoprazole sodium and pantoprazole magnesium.

3. The multiparticulates according to claim 1, wherein the hydrate is a sesquihydrate.

4. The multiparticulates according to claim 1, wherein the pantoprazole salt or hydrate thereof is present in an amount of about 45% w/w.

5. The multiparticulates according to claim 1, wherein said multiparticulates have an average diameter of about 1 mm.

6. The multiparticulates according to claim 1, wherein said enteric coat comprises about 48% w/w of the particulate.

7. The multiparticulates according to claim 1, further comprising a final seal coat on the enteric coat.

8. The multiparticulates according to claim 7, wherein the final seal coat comprises about 0.1 to 10 wt % of the multiparticulates.

9. The multiparticulates according to claim 7, wherein the final seal coat comprises hydroxypropyl methylcellulose (hypromellose).

10. The multiparticulates according to claim 1, wherein said initial seal coat is in the range of about 2 to about 4% w/w of the weight of the uncoated core.

11. The multiparticulates according to claim 1, wherein the enteric coating comprises about 30% w/w of methacrylic acid and methyacrylate copolymer, about 15% w/w talc, about 3% triethyl citrate and a pH adjuster; said amounts being by weight of the multiparticulates.

12. Pantoprazole multiparticulates having reduced release under gastric conditions and fast release at neutral pH, wherein each of said multiparticulates comprises: a spheroid core comprising a pantoprazole salt or a hydrate thereof in an amount of about 40% w/w free pantoprazole, as the sole active component in the multiparticulate and about 25% to about 30% w/w microcrystalline cellulose, about 4% to about 6% w/w polysorbate 80, about 14% to about 16% w/w crospovidone, about 0.5 to about 2% w/w hydroxypropyl methylcellulose, about 5% to about 8% w/w sodium carbonate, and about 1 to about 2% w/w water; an initial seal coat comprising hydroxypropylmethyl cellulose on the spheroid core; and an enteric coat on the initial seal coat, wherein said multiparticulates have an average diameter of about 0.7 mm to about 1.25 mm.

13. A product comprising a plurality of pantoprazole multiparticulates, each comprising a spheroid core comprising a pantoprazole salt or a hydrate thereof in an amount of about 40% w/w free pantoprazole, as the sole active component in the multiparticulate and about 25% to about 30% w/w microcrystalline cellulose, about 4% to about 6% w/w polysorbate 80, about 14% to about 16% w/w crospovidone, about 0.5 to about 2% w/w hydroxypropyl methylcellulose, about 5% to about 8% w/w sodium carbonate, and about 1 to about 2% w/w water; an initial seal coat comprising hydroxypropylmethyl cellulose on the spheroid core; and an enteric coat on the initial seat coat, wherein said multiparticulates have an average diameter of about 0.7 mm to about 1.25 mm.

14. The product according to claim 13, comprising about 10 mg to about 100 mg pantoprazole, based upon the weight of free pantoprazole base.

15. The product according to claim 14, comprising about 40 mg pantoprazole, based upon the weight of free pantoprazole base.

16. The product according to claim 14, wherein said plurality of multiparticulates are in an aqueous suspension.

17. The product according to claim 14, wherein said plurality of multiparticulates are in a capsule.

18. A method of producing a multiparticulate formulation of pantoprazole having reduced release under gastric conditions and fast release at neutral pH, said method comprising: producing a spheroid core comprising a pantoprazole salt or a hydrate thereof in an amount of about 40% w/w free, as the sole active component in the multiparticulate and about 25% to about 30% w/w microcrystalline cellulose, about 4% to about 6% w/w polysorbate 80, about 14% to about 16% w/w crospovidone, about 0.5 to about 2% w/w hydroxypropyl methylcellulose, about 5% to about 8% w/w sodium carbonate, and about 1 to about 2% w/w water, via extrusion and spheronization; applying an initial seal coat comprising hydroxypropyl methyl cellulose to the spheroid core; applying an enteric coating to the initial seal coated spheroid core, said enteric coating comprising a copolymer of methacrylic acid and methacrylates; and optionally applying a final seal coat to the enteric-coated spheroid core, said final seal coat being about 1 wt % of the multiparticulate; wherein the multiparticulates have an average diameter of about 0.7 mm to about 1.25 mm.

19. The method according to claim 18, wherein the spheroid core is prepared by mixing the ingredients in a low shear mixer at low shear conditions at a range of about 25 rpm to 35 rpm.

20. The method according to claim 19, wherein the low shear conditions are 32 rpm.

21. The method according to claim 18, wherein the spheroid cores are dried at a low temperature not exceeding about 40.degree. C. for a period of 8 to 72 hours to a percent (%) loss-on-drying (LOD) of 3.4% to 4.3%.

22. The method according to claim 18, further comprising the step of applying a layer of talc in an amount of 0.05% w/w to 0.1% w/w of the multiparticulates.

23. The method according to claim 18, wherein the enteric coating is sprayed as a suspension onto the spheroid core.

24. A method of treating ulcers of the stomach and duodenum, gastroesophageal reflux disease (GERD), or Zollinger-Ellison Syndrome in a mammalian subject, comprising the step of administering to the subject a plurality of pantoprazole multiparticulates according to claim 1 comprising about 10 mg to about 100 mg pantoprazole, based upon the weight of free pantoprazole base.
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