US Federal Trade Commission decided not to challenge the combination of the two companies
Steris has completed its US$1.9bn takeover of Synergy Health, a transaction that took more than a year to complete.
The transaction, first announced in October 2014, was delayed by the US Federal Trade Commission's request for a preliminary injunction to block the acquisition.
Both companies said during this delay that the transaction was 'procompetitive and in the best interest of all constituents of the two companies, including customers'.
On Friday 30 October, the FTC announced that it had decided 'not to pursue further administrative proceedings challenging the combination between Steris Corporation and Synergy', and formally dismissed the administrative complaint.
Walt Rosebrough, President and CEO of Steris, said the finalisation of the deal 'marks a significant milestone for Steris, creating a stronger global leader in infection prevention and sterilisation, better-positioned to provide comprehensive solutions to medical device companies, pharmaceutical companies, hospitals and other healthcare facilities around the world'.