or tenderness, nausea or vomiting, rapid heartbeat, increased hunger or thirst, constipation, dizziness or fainting, changes in urine or eyesight, muscle pain or weakness, joint pain, confusion or memory problems, fever, rash, itching, or flushing. these are not all the possible side effects. tell your doctor about all your medical conditions, including immune system problems, if you've had an organ transplant, had or plan to have a stem cell transplant, or have lung, breathing, or liver problems. (dr. kloecker) any day you can give good news to a patient is a good day. (avo) living longer is possible. it's tru. keytruda, from merck. with more fda-approved uses for advanced lung cancer than any other immunotherapy.