The invention provides a method for preparing a mesalazine enteric coated tablet comprising: (i) granulating a composition comprising mesalazine, a pharmaceutically acceptable salt, or ester thereof, into mesalazine granulates； (ii) tabletting a core composition comprising the mesalazine granulates obtained in (i) to obtain a tablet core； (iii) coating the tablet core obtained in (ii) with at least an intermediate layer and an enteric coating； where the tablet core hardness is controlled to be comprised between 80 N and 105 N and the intermediate layer represents less than 2% by weight of the tablet.
