you can't become dependent on it. Even most of the stimulatory laxative you can't become dependent on (that is you made yourself worse than you would be on your own). The one laxative they blamed "cathartic colon" on is off the market and they have no evidence any of the current ones do that at all (although I will say people who do the binge and purge and take 10-100X the regular dose may cause problems, but that may be as much from the disordered eating as from the massive doses of laxatives).However if you have chronic constipation you will need chronic treatment, and constipation can get worse on its own as well.Miralax is pretty safe even as you increase dose. So if you need more osmotics (like if your transit is pretty slow and you only go a few times a month and if that is the case you do want to back off the fiber) it is a pretty good one to up the dose of.If your constipation is getting worse a transit test if you haven't had one may be in order, but you will have to be off laxatives and some people can't do that unless they can take a week off.