GSK said on Wednesday it expects to report annual sales and profit towards the top end of its forecast range, after the British drugmaker beat expectations for second-quarter sales and earnings, bolstering the company's bid to reignite growth.

The U.K. pharmaceutical company is expected to report sales of 7.8 billion pounds ($10.42 billion), according to consensus estimates compiled by the company. For last year's second quarter, GSK reported sales of 7.