Ciprofloxacin
"Prescribed 7 day treatment for UTI, (2x/day), of Ciprofloxacin 500mg, two months after 6 week course of BCG infusions for  bladder cancer. Only took 11 pills then stopped because of warnings of possible side effects. Then about two weeks after that, started to have pains in right side around right kidney area. Now this week my left side kidney area is aching. Dr. is out of town 'til Monday the 28th of Nov."