Omnicom’s BBDO in New York landed creative duties on Schering-Plough’s Nasonex brand, sources said last week. The shop beat two other finalists, incumbent The Quantum Group in Parsippany, N.J., a unit of WPP’s CommonHealth division, and Publicis’ Saatchi & Saatchi Consumer Healthcare in New York. The client declined comment. Schering-Plough will spend $30-40 million on the brand, sources said. Nasonex recorded no ad spending in 2003, according to Nielsen Monitor-Plus.