What is the difference between peri-colace, amitiza, (lubiprostone) and miralax?

Explanation of lax. colace (docusate sodium) is not a laxative, just a softener-acts a litle like adding slipperyness to stool so it comes out easy-no stimulants miralax is a lavage, so it just goes thru your pipes and takes everything with it. so it acts like a laxative but not by stimulation of the intestines amitiza (like Linzess) simply interferes with absorption of water from the colon, making the stools more moist.