Merck 1Q Revenues: $5.4 billion (+1%) 1Q Earnings: $1.5 billion (+11%) Comments: Zocor and Singulair performed well in the quarter. Worldwide sales of Singulair were $801 million, up 9%. Worldwide Zocor sales were $1.1 billion, down 4%, but U.S. sales were up 13%. Strong results from partnerships drove earnings for the quarter. As reported by the Merck/Schering-Plough partnership, global sales of Zetia and Vytorin reached $793 million. Global sales by the Merck/Schering-Plough chole...