
The company has recently extended beyond its core offering with the launch of an instant SMS information service that claims to answer any question. The repositioning began in March, with a drive created by WCRS featuring the 118 118 'runners' transformed into grey-haired boffins.
Murphy replaces Mark Horgan, who has been promoted to European chief executive.
While at Superdrug, Murphy led a repositioning that aimed to align the brand with fashion and establish it as an alternative to supermarkets.
He left Superdrug, which he joined from Matalan as head of marketing in 2005, last month. Prior to that, he had worked for Toys 'R' Us until 2002.
Murphy's responsibilities at Superdrug have been assumed by trading director Jeff Wemyss.