The invention relates to a pharmaceutical immediate release tablet comprising a core comprising 70-85 weight percent of sevelamer carbonate, calculated as an anhydrous compound, 10-25 weight percent of lactose monohydrate and, optionally, a water soluble film coat surrounding the to a process of making such tablets, to their use in medicine, and to the use of polyvinyl alcohol-polyethylene glycol graft copolymer for making such coated tablets.