Definitely talk to the Dr. about getting reduced dosage of the BCG. I started getting reaction (fever) during maintenance treatments, and was able to successfully complete them after the dosage was reduced. My maintenance protocol was somewhat different, with BCG instillations 3 weeks in a row every 3 months, then every 6 months at the end. I think once per month might be better, though there's less time between treatments to recuperate if there's a bad reaction. If your husband ends up having to stop the maintenance due to severe reactions, it's not the end of the world because he's at least had the initial course of treatment. There are differences of opinion in the medical community about maintenance schedules anyway.
Ann
Small TA Grade 1, May-06; recur (2 tiny), same, June-08; TURBTs both times. BCG begun July-08, dosage to 1/3rd May-10, completed treatment December-11. All clear since 2008.