I Morine Barnes have taken prescribed Bisacodyl 1x5mg tablets nightly which have left me constipated vegetarian who drinks plenty of water and do exercise for constipation. I cannot talk to anybody about it and nobody can talk to me i am constipated. Dr RB Chitre GP cares I care. Dr RB Chitre said that is my prescription take it or leave it. When does this laxative work. When can I empty my bowels. Nobody want to perform the operation. Barnes 58. Donald 59, Myola 37 & Rommel Edwards 35. Graham 90.