Endo Pharmaceuticals, which is based in Chadds Ford, reported a 57 percent increase in revenue for the fourth quarter of 2011, but acquisition costs sliced the profit by 61 percent.
The revenues for the quarter rose to $803 million compared to $511.2 million in the same quarter of 2010.
The net income dropped from $93 million in the fourth quarter of 2010 to $36.6 million in the same period of 2011.
In June, Endo bought American Medical Systems, which helped with fourth quarter revenue, but Endo paid about $140 million in the fourth quarter to reduce the debt owed on that purchase. For the year, Endo spent $290 million on servicing that debt.