Immodium Plus helps settle the stomach as well as sort out 'further down'. I take it for races from half marathon upwards. Part of my success in doing a pb at London this year was, I'm sure, down to the three (yes!) immodium plus taken in the morning. I took two at home and then another one for luck just before the start! As a vegetarian I have a very quick metabolism so it gets even more dodgy.... On training runs I reckon I can always: get home by walking, find an open pub (did you know they have toilets?), find a bush or dark corner (sorry). I did follow someone up their garden path once and ask very pathetically if I could use their facilities and the nice lady said yes!