shares of pfizer inc pfe rallied 20 in premarket trading tuesday toward a 4thstraight gain and to extend its bounce off a 2year low after the drug maker reported firstquarter profit and revenue that fell but beat expectations by wide margins net income fell to 554 billion or 97 cents a share from 786 billion or 137 a share in the yearago period excluding nonrecurring items adjusted earnings per share of 123 beat the factset consensus of 98 cents revenue dropped 288 to 1828 billion but was above the factset consensus of 1661 billion biopharmaceutical business revenue fell 290 to 1797