GSK to buy US biotech firm IDRx for up to $1.15 billion

British drugmaker GSK said on Monday that it would pay up to $1.15 billion to buy Boston-based biopharmaceutical firm IDRx, which is developing a treatment for a rare type of tumour.

IDRx, a privately held biotechnology firm, is developing a therapy for the treatment of gastrointestinal stromal tumours.

The deal, which comprises an upfront payment of $1 billion, will add to GSK's growing portfolio in gastrointestinal cancers.


The British drugmaker, which has been grappling with a decline in its vaccines businesses, has stepped up its efforts in cancer treatment in recent years.

"This acquisition is consistent with our approach of acquiring assets that address validated targets and where there is clear unmet medical need, despite existing approved products," GSK's Chief Commercial Officer, Luke Miels, said in a statement.