GlaxoSmithKline said it will shift media buying and planningfor its North American OTC brands to WPP’s MediaCom by the end of February.MediaCom already handles buying and planning tasks for the firm’s prescriptiondrug business.

Media duties on the OTC business—which includes brands likePanadol, Aquafresh, Lucozade and Nicorette—had been split among Havas’ MPG,MediaCom, Publicis’ Optimedia and Campbell Mithun.

It’s not the first time in recent years that GSK has upendedits marketing vendors. Last year the company moved all of its professional advertisingfrom WPP agencies to IPG ones.