This is identical to what just happened to my ex spouse, though i took care of him the whole time in my home. It's rough. There was pain, especially when the cancer worked it's way across the spine trying to get to the other lung. Can't tell you the volume of pain meds required till he gave up and hospice was required. They know a lot about pain and anxiety meds to settle him down. He at least finally passed comfortably with their help. At the last few days, they provided 24 hour a day nurses as his daughter and I were thoroughly wiped out physically and mentally. I don't know how advanced your friend is, but I'm now a believer in hospice, they see the signs of things even I didn't see nor understand (and I'm an RN). He passed this August.