Oxy-Powder dissolves compacted fecal matter and does not interfere with healthy peristalsis. FYI, if you decide to use a laxative based aid that could intefere with healthy peristalsis, the trick is to use it two weeks on and two weeks off and not to use it for more than 6 months, otherwise you could end up with a serious condition known as melanosis coli or black intestines. You can read more about this here: