Pfizer (NYSE:PFE) fell by 3.10% to trade at $43.74 by 11:25 (16:25 GMT) on Thursday on the NYSE exchange.
The volume of Pfizer shares traded since the start of the session was 8.95M. Pfizer has traded in a range of $43.69 to $44.73 on the day.
The stock has traded at $46.4500 at its highest and $42.9700 at its lowest during the past seven days.
