Hi, does anyone have any experience of thie? my ds2 had a uti as a baby. It started at about 10weeks and didnt get diagnosed till 18weeks old. (I was a paranoid mum of 3). After investigation it was found that he has a twisted tube coming from one of his kidneys. He has been on trimethoprim ever since. He is 4yrs now and every now and then, at least 4 times a week he is stopped in his tracks with pain in the kindey area of his back. GP says not infection as the pain would be constant, but it is worrying me as it hurts him so much. Any advice greatly appreciated.