keytruda visual side effects
Common Keytruda side effects may include: 1  nausea, vomiting, stomach pain, loss of appetite, diarrhea, constipation; 2  low sodium levels, abnormal liver function tests; 3  itching or rash; 4  fever, cough, feeling short of breath; 5  pain in your muscles, bones, or joints; or. 6  feeling tired.