I agree, Miralax takes several days, at least 3 for me, too sometimes more. My GI Dr. said to speed that up I could take it 2 X's a day. I have been relying on it along with Citracel and lots of water and fiber in diet, but finding a balance of both as to not be " going all the time" is tricky. Plus I'm not real happy about relying on the Miralax. But it has helped my lower left pain and constipation issues.