Issued: Friday 15 April 2011, London UK

GlaxoSmithKline plc (GSK) announced today that it has submitted a Marketing Authorisation Application (MAA) to the European Medicines Agency (EMA) for Tyverb (lapatinib) in combination with paclitaxel for the treatment of patients with metastatic breast cancer whose tumours over-express HER2 (ErbB2).

Tyverb/Tykerb is approved in over 90 countries including the EU, Switzerland, US, Canada, Japan, Australia and countries in South America and Asia.

GlaxoSmithKline – one of the world’s leading research-based pharmaceutical and healthcare companies – is committed to improving the quality of human life by enabling people to do more, feel better and live longer.  For further information please visit www.gsk.com

GlaxoSmithKline cautionary statement regarding forward-looking statements
Under the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, GSK cautions investors that any forward-looking statements or projections made by GSK, including those made in this announcement, are subject to risks and uncertainties that may cause actual results to differ materially from those projected. Factors that may affect GSK's operations are described under 'Risk Factors' in the 'Business Review' in the company's Annual Report on Form 20-F for 2010.