Fig. 1From: The insoluble excretion of multi-matrix system mesalazine preparations in patients with ulcerative colitisInsoluble excretion. a Insoluble MMX tablets in the rectum. b Insoluble excretion of intact tablets. Insoluble excretion was defined as the excretion of tablets with an intact pH-responsive coating, regardless of the number and frequency of excreted tabletsBack to article page