text: solution for tummy bug? my dad has got a stomach bug but is not throwing up. he has a runny bum. he has been to the doctors and the doctor gave him some tablets to take but they are not working. i am really worried about my dad but..........i know that he will be fine in no time. but i was just wondering:  what should he eat  and what shouldn't he eat?   and what should he drink  and what shouldn't he drink?   thanx! flat coke is great for helping with a poorly tummy.  put a teaspoon of sugar in it to make it flat but make sure that it's in a large container as it will froth up loads.  guinness is also good but it isn't to everyone's taste!  (and it can make your poos black!)