The most common side effects with Yondelis (seen in more than 1 patient in 10) are increased blood levels of creatine phosphokinase (marker of muscle breakdown) and of creatinine (a marker of kidney problems), decreased blood levels of albumin (a marker of liver problems), neutropenia (low levels of neutrophils, a type of white blood cell), thrombocytopenia (low levels of platelets in the blood), anaemia (low levels of red blood cells), leucopenia (low levels of leucocytes, a type of white blood cell), headache, vomiting, nausea (feeling sick), constipation, anorexia (loss of appetite), fatigue (tiredness), asthenia (weakness), hyperbilirubinaemia (high levels of bilirubin in the blood) and increased levels of liver enzymes in the blood (alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and gamma-glutamyltransferase).