The most common side effects with Avandia (seen in between 1 and 10 patients in 100) are anaemia (low red blood cell counts), hypercholesterolaemia (high blood cholesterol levels), hypertriglyceridaemia (high blood levels of triglycerides, a type of fat), hyperlipaemia (high blood levels of lipids, another type of fat), weight increase, increased appetite, cardiac ischaemia (reduced oxygen supply to the heart muscle), constipation, bone fractures (broken bones), hypoglycaemia (low blood glucose) and oedema (swelling).