Piramal in January had announced the acquisition for a cash consideration of USD 171 million and up to an additional USD 32 million payable depending on financial performance of the acquired assets over the next three years.
"Piramal Enterprises announced that its wholly-owned Critical Care subsidiary in the UK has completed its acquisition of a portfolio of drugs for spasticity and pain management from Mallinckrodt LLC," the company said in a BSE filing.
Piramal's critical care business is a global player in the hospital generics segment. It is the world's third largest producer of inhaled anesthetics.
In the twelve months ended September 30, 2016, the acquired portfolio generated revenues of USD 44.6 million.
Shares of Piramal Enterprises were trading at 1871.90, up 0.50 per cent on BSE.