RHD...... Then with my knowledge, your father has reached stage 4 in lung cancer if it has invaded other sites within the body. If he wants to stay with you, then see about getting a nurse in to help you and your family cope. Mom had a hospice person start coming in after she was declared unsafe to be alone. This happened about 8 months before her death.
You do not say where you are but in Canada once you are declared to be in need of a hospice, all your meds are covered by the gov't. This would include the Iressa. I am not saying there were no side effects from Iressa, there may as well be for some people...... Yes, it did help mom in the last stage of life.
I would also like to suggest that you read the book
"Final Gifts" I would also ask the doctor about time lines, to give you and your family time to adjust to the incurable nature of this cancer. Talk to him about his wishes, make sure that his will is all in place. Get a video tape and tape him now! Get voice recordings. Yes, you may have years yet, but it gives all who know him, time to adjust, and value the time here and now.
Leisa