Shares of large pharmaceutical companies opened higher Monday as the broader market gained ground on declining oil prices and a higher dollar.
Here's how some key drug makers performed Monday:
Wyeth up 35 cents to $44.28.
Merck & Co. shares up 4 cents to $39.05
Bristol-Myers Squibb Co., up 22 cents to $21.93.
Pfizer up 6 cents to $19.85.