Hello emmie405I have taken Colofac in the past myself,but it did not help me.i took it for the pain i get,but remember there are other types if one does not suit you.I have a problem with chronically straining and my BM are always soft,its a nightmare when it wont come out!Leaves you feeling sick and bloated.A week is long not to have a BM and can leave you feeling uncomfortable.Maybe if you still havent gone in a few days,you should think about taking something gentle and natural to try and help.The Doctors always tell you not to worry and relax,but easier said than done!Maybe you should go back and have a chat to your Doctor about what is happening with your bowel habit,if you feel it is the Colofac that is causing you the problems.Take care