Hello, my husband has advanced RCC and IL-2 (short for high dosage interleukin) was his first therapy. We decided to try it because it was his best choice for a cure. Although he tolerated 26 out of the 28 doses, the treatment was unsuccessful in shrinking his tumors. Keep in mind, there is only a 15% response rate for a complete durable remission with this treatment. But it's your best shot at getting cured. In response to whether or not he'll be able to work, I would plan on taking a month off. We brought the laptop to the hospital for him to attempt to stay connected with work, but after two days, he was too weak to do anything. The treatment is very toxic and rough, but once the treatment stops, you recover in a few days. I stayed with my husband every minute, even staying overnight in his room, and that was helpful. Bring a supply of movies and a DVD player to pass the time - he will be out of it for the most part. Hang in there and I pray you get a response. If you do, the doctors will probably want to continue with two or three more cycles, if you can handle it.