Sorafenib is a bi-aryl urea and an oral multikinase inhibitor. It targets cell surface tyrosine kinase receptors and downstream intracellular kinases that are implicated in tumour cell proliferation and tumour angiogenesis. First approved by the FDA and European Commission in 2007 for the treatment of hepatocellular carcinoma, sorafenib is also indicated to treat renal carcinoma and differentiated thyroid carcinoma.