Hi Archrock,
Sometimes people who react badly to BCG are offered BCG (low dose) plus Interferon. It is very effective and less toxic. More expensive though, so not usually given unless BCG causes reactions and your insurance will pay for the newer combination. Worth asking, perhaps. More info here:
http://blcwebcafe.org/interferon.asp
Regular old BCG can also be lowered in dose without losing effectiveness. Discuss this with your doctor too (and more info on WebCafe's BCG page).
Wendy