Direct compression polymer tablet core

A tablet core comprising at least approx. 95% by weight of an aliphatic amine polymer. Also disclosed is a process for preparing a tablet core comprising at least about 95% by weight of an aliphatic amine polymer resin. The method comprises the step of pressing the aliphatic amine polymer to form the tablet core. The tablet core may further include one or more adjuvants. This process for preparing the tablet core comprises the steps of: (1) hydrating the aliphatic amine polymer to the desired moisture level; (2) mixing the aliphatic amine polymer with the adjuvants in such amounts that the polymer comprises at least approx. 95% by weight of the resulting mixture; and (3) pressing the mixture to form the tablet core. Further, a coated tablet is disclosed which comprises an aliphatic amine polymer core, the coating being a water-based coating.