Fig. 2

Various types of insoluble excretion. a, b “Melted tablets”, where the internal MMX is excreted with only the pH-responsive coating having dissolved. c, d So-called “ghost pills”, where the contents have disappeared, and only the coating is excreted. Cases in which excreted MMX had been exposed due to part of the coating having dissolved, and those involving so-called "ghost pills", where the contents of the tablet had disappeared, and only the coating was excreted, were not counted as insoluble excretion in this study