Details for Patent: 8,187,631

Title:	Direct compression polymer tablet core
Abstract:	The present invention provides a tablet core which comprises at least about 95% by weight of an aliphatic amine polymer. The invention also provides a method of producing a tablet core comprising at least about 95% by weight of an aliphatic amine polymer resin The method comprises the step of compressing the aliphatic amine polymer to form the tablet core. The tablet core can further include one or more excipients. In this embodiment, the method of producing the tablet core comprises the steps of: (1) hydrating the aliphatic amine polymer to the desired moisture level; (2) blending the aliphatic amine polymer with the excipients in amounts such that the polymer comprises at least about 95% by weight of the resulting blend; and (3) compressing the blend to form the tablet core. The present invention further relates to a coated tablet comprising an aliphatic amine polymer core wherein the coating is a water based coating.
Inventor(s):	Tyler; Joseph (Somerville, MA), Petersen; John S. (Acton, MA)
Assignee:	Genzyme Corporation (Boston, MA)
Filing Date:	Aug 03, 2009
Application Number:	12/461,143
Claims:	1. A compressed tablet comprising: a hydrophilic core, comprising at least or about 95 wt. % poly(allylamine) or a salt thereof with a pharmaceutically acceptable acid, and a water-based coating, comprising a cellulose derivative and a plasticizing agent. 2. The compressed tablet of claim 1, wherein the poly(allylamine) or salt thereof is cross-linked. 3. The tablet of claim 2, wherein the poly(allylamine) or salt thereof is cross-linked with epichlorohydrin. 4. The tablet of claim 1, wherein the poly(allylamine) is hydrated. 5. The tablet of claim 1, wherein the poly(allylamine) comprises a moisture content of about 5 wt. % or greater. 6. The tablet of claim 1, wherein the poly(allylamine) comprises a moisture content of about 5 wt. % to about 9 wt %. 7. The tablet of claim 1, wherein the hydrophilic core is a linear or cross-linked poly(allylamine) or a pharmaceutically acceptable salt thereof. 8. The tablet of claim 1, wherein the hydrophilic core is a hydrated cross-linked poly(allylamine hydrochloride). 9. The tablet of claim 1, wherein the water-based coating comprises hydroxypropylmethylcellulose and a plasticizer. 10. The tablet of claim 1, wherein the water-based coating comprises hydroxypropylmethylcellulose low viscosity, hydroxypropylmethylcellulose high viscosity, and diacetylated monoglyceride. 11. The tablet of claim 1, wherein the tablet comprises one or more excipients. 12. The tablet of claim 2, wherein the poly(allylamine) or salt thereof is sevelamer hydrochloride. 13. A compressed tablet, comprising a hydrophilic core and a water-based coating, the core consisting essentially of: i) poly(allylamine) or a salt thereof; and ii) one or more excipients, wherein the total amount of excipients is from 0 wt. % to about 5 wt. % of the tablet core. 14. A method of removing phosphate from a patient in need thereof, comprising administering to said patient a tablet comprising a hydrophilic core and a water-based coating, the core consisting essentially of: i) poly(allylamine) or a salt thereof; and ii) one or more excipients, wherein the total amount of excipients is from 0 wt. % to about 5 wt. % of the tablet core. 15. The method of claim 14, wherein the poly(allylamine) or salt thereof is cross-linked. 16. The method of claim 14, wherein the poly(allylamine) is hydrated. 17. The method of claim 14, wherein the water-based coating comprises a cellulose derivative and a plasticizing agent. 18. The method of claim 14, wherein the water-based coating comprises hydroxypropylmethylcellulose and a plasticizer. 19. The method of claim 14, wherein the water-based coating comprises hydroxypropylmethylcellulose low viscosity, hydroxypropylmethylcellulose high viscosity, and diacetylated monoglyceride. 20. The tablet of claim 1, wherein the poly(allylamine) comprises a moisture content of about 7 wt. %.