GlaxoSmithKline Plc has agreed to plead guilty to misdemeanor criminal charges and pay $3 billion to settle the largest case of healthcare fraud in U.S. history.

The settlement includes $1 billion in criminal fines and $2 billion in civil fines in connection with the sale of the drug company’s Paxil, Wellbutrin and Avandia products, according to filings in federal court on Monday.