Question to you or anyone one Keytruda. This is Colleen I have stave 4 lung cancer unbeatable which I did 3 types of chemo and Keytruda for 7 and half months. The chemo made me so sick I quit the chemo. Since than (December)I have been on Keytruda only. In May I had swollen fingered, wrist, hand, neck and spine which I could not move. No strength. June 2nd my Mayo Dr. took test for rheumatoid arthritis which she taught it was. Had me go to primary Dr here which I did. She did Xrays and test and taught it was Arthritis that was inflamed Or Soto gout. And agreed with Mayo dr that I should be put on pedistone. Miracle drug. After 10 days was almost normal but after 6 days was back were I had to go on another 10 days. That was three days ago and started back again. Has anyone had this happen?