GlaxoSmithKline Plc Chief Executive Officer Andrew Witty

GlaxoSmithKline Plc Chief Executive Officer Andrew Witty

Andrew Harrer/Bloomberg

GlaxoSmithKline Plc Chief Executive Officer Andrew Witty said, “What we’ve seen in the last three, four months is a much higher level of price pressure than we had anticipated, which is of course making short-term trading more challenging than expected.”