I used the Ducolax suppositories before. They do work within an hour at most. I personally didn't like them as they still made me cramp etc alot. I use stool softners nightly for my constipation. They will take a couple days to kick in, but the work so much more comfortably for me. What they do is draw the water to your stool to soften it up and make it easier to pass. Hope that helps.
Gail*Nanners* Co-Moderator for Crohns Disease
Crohn's Disease for over 34 years. Currently on Asacol, Prilosec, Estrace, Prinivil, Diltiazem, Percoset prn for pain, Zofran, Phenergan, Probiotics, Calcium, Vit D, and Xanax prn. Resections in 2002 & 2005. Also diagnosed w/ Fibromyalgia, Osteoarthritis, & Anxiety. Currently my Crohns is in remission, but my joints are going crazy!