The most common (more than 1 in 100 patients and less than 1 in 10 patients) side effects are: • Headache • Diarrhoea, nausea, vomiting • Rash, itching • Problems with the vein into which the medicine is given (including inflammation, formation of a lump, swelling at the injection site, or leaking of fluid into the tissue and skin around the injection site).