Miralax is not designed to work work right away. It normally takes a few days to kick in but can in as soon as the second day. I would not recommend upping the recomended dose without consulting your doctor. Laxatives must be used with extreme caution as they can upset your electrolyte balance. If you are looking for a quick fix and you will be home all day, you may want to try a fleet enema or OTC prep kit. A Dulcolax usually will work within the day but it is a stimulant laxative so you may have a bit of cramping.
Co-Moderator ~ IBS Forum
Dx: IBS 1989, Diverticulosis 2004, Idiopathic Acute Colitis 2006, UCTD 2007
Meds: Plaquenil 400mg, Chlorzoxazone 500mg, Lyrica 50mg, Protonix 40mg, Naproxen 1000mg, Klonopin 2mg/day (tapering to PRN), Miralax 17g, Supplements