Gabriel,
I assume that Nescafe is much like regular coffee? I hope no one asks me to stop drinking coffee. When I asked my Urologist if coffee caused bladder cancer his answer was, "I hope not". To be honest, I'm not sure anyone really knows if coffee is harmful to the bladder. At one time I used to hear that it was harmful, but I think that researchers have since reversed that decision. Like I said, I hope that no one tells me that I have to stop my coffee...
I took Garlic and a similar supplement to Oncovite while taking BCG's. I also drank plenty of good water to flush the bladder out really good.
I don't think that it really matters that much that he couldn't hold the BCG for the full two hours. I've read in several places by researchers on the net that it isn't that big of a deal if you can't hold it for 2. It might help though, if he doesn't drink a lot before his treatment. I usually hold off from drinking liquids before treatment and then start drinking pure water about the one hour mark to start flushing out.
His symptoms sound pretty normal to me. Watch out for fever and chills, though.
Best of luck,
Rosemary