As everyone said, there really isn't anything you have to stay away from. I did stay away from caffeine, just because of the sensitive bladder.
I did try to eat extra healthy. Lots of Vit. A fruit and vegies, broccoli (I still eat at least a cup and 1/2 a week)I still eat healthy, but put a little more effort into high vit. foods.
I am not aware of any special diet to help on BCG side affects. However, I took carbonated soft drinks out of my habits. Have no clue if it helps or not. Most of us have seena dirty penny get "clean" after a soda bath! Also, I can't find the reference but, somewhere I have read by Dr. Lamm or someone else has observed fewer reoccurences with patients deleting soft drinks.
Drink lots of water after the 2 hour or near to 2 hour hold during treatment.
DX 5/6/2008 TAG3 papillary tumor .5 CM in size. 2 TURBS followed by 6 instillations of BCG weekly with a second round of 6 after a 6 week wait.