Hi Ceri,
I am battling with the same question about continuing with BCG treatments because of my severe arthritic like reaction a week after my 9th instillation. If my symptoms get worse, I do not know how I can continue to work. I can hardly buckle my seatbelt or zip my pants. You never realize how much you need your right thumb until you need it. I also have a severe, resistant yeast infection. All of this is a rare reaction.
When my GP decided that my reaction was BCG related, he admonished me to continue with the treatments and deal with the symptoms. I feel exactly like your husband feels. But, I do not know the answer.
Perhaps you could E Mail Dr. Lamm, or find an answer by searching his web site. He is a noted BCG expert in the field and has done much research on our behalf. And, he has always been so kind to reply to our queries..
www.bcgoncology.com/
Please let me know what you decide. It would help me to think this thing through for myself.
Your husband is lucky to have you.
Warmest regards,
Rosemary