KEY POINTS
  • Mallinckrodt Pharmaceuticals generated $790.6 million in revenue for the first quarter of 2019, beating estimates of $767.2 million.
  • The company has recently been embroiled in two whistleblower lawsuits that have negatively impacted the company's stock.
The Mallinckrodt Pharmaceuticals sign at the company's offices in St. Louis.

Shares of Mallinckrodt Pharmaceuticals seesawed Tuesday morning, swinging up by as much as 16.4% before the markets opened but trading lower after the company reported otherwise strong first-quarter earnings and raised its profit outlook for the year.

Mallinckrodt attributed its strong quarterly performance to sales of hospital products and generic drugs.