Opening Glance: Pharmaceuticals

Shares of large pharmaceutical companies opened higher Thursday as the broader market rose on reports of better-than-expected April retail sales.

Here's how some key drug makers performed Thursday morning:

Wyeth, up 20 cents to $44.67

Merck & Co., up 29 cents to $39.30

Bristol-Myers Squibb Co., up a penny to $22.77

Schering-Plough Corp., up 22 cents to $18.40