GlaxoSmithKline plc (LSE: GSK NYSE: GSK) is a Unite Kingdom-based pharmaceutical, biological, and healthcare company. GSK is a research-based company with a wide portfolio of pharmaceutical products covering anti-infectives, central nervous system (CNS), respiratory, gastro-intestinal/metabolic, oncology, and vaccines products. It also has a Consumer Healthcare operation comprising leading oral healthcare products, nutritional drinks, and over the counter (OTC) medicines.