That is correct. PPIs would not work as an enema. Well, maybe they would, but it would be silly, because they do not work topically. They need to be absorbed, then they work systemically by inhibiting acid production in the stomach. Any which way you absorb them, they still act on the stomach. The way they might improve your pouch function is that for some people, controlling the stomach acid seems to help further on down the line in how caustic the output is. Also, if you have gastric reflux or dyspepsia, controlling that might settle down a hyperactive gut in general.
Jan