Hi ehb999,
My husband has lung cancer and had Keytruda treatments. We read the side effects but were convinced by the doctor, that they were rare side effects and that the therapy would help immensely. After having the Keytruda treatment, my husband almost died by contracting Pancreatitis a known side effect! It was because of our very good primary doctor and prayers, that he got to the right specialist and after a long battle, my husband was fine. However, he says he will never have another Keytruda treatment. The doctors didn't like that decision but it is my husband's body and money! (Keytruda cost $25,000 per infusion!) He received two infusions per month. That was 5 years ago. My husband is doing great! He's 82 and leaf blows the yard, trims trees, carries heavy garbage bags to the dumpster, drives the car and fixes breakfast, lunch and dinner! We prayed a lot and our prayers were answered.
I would suggest doing as much research on Keytruda as you can before you make a decision. Don't just take what happened to my husband as the only result. Everyone is different when it comes to medication. Once you have a lot of information, then you can decide what is best for you. Pray about it and God will direct you.

I'll remember you in my prayers.
PML