US pharmaceuticals giant Pfizer said Tuesday that its second-quarter profit rose 5 percent from a year ago to $2.6 billion, slightly beating analysts' expectations.
The company's revenues for the April-June period were $17.0 billion, down one percent from the same period last year, the New York-based company said in a quarterly earnings report.
Diluted earnings per share were 60 cents, just above the consensus analyst forecast of 59 cents.
"Our performance this quarter was in-line with our expectations," chief executive Ian Read said in a statement.
Pfizer's "results were impacted by losses of exclusivity of several key products in certain geographies," Read said.
Pfizer is facing uncertainty as some of its top-selling drugs are set to lose patent protection in the near future, notably anti-cholesterol drug Lipitor, which will go off-patent in the United States in November.
The company said its emerging markets unit lost $59 million in sales as a result of several key medicines, including Lipitor and sexual-potency drug Viagra, being opened up to competition in Mexico and Brazil in 2010.
Shares of Pfizer fell 1.2 percent in pre-market trading after the earnings report was released.