Walgreens Boots Alliance has agreed to pay $300 million to settle allegations that it filled millions of invalid prescriptions for opioids and other controlled substances and illegally billed federal programs such as Medicare for those medications, the U.S. Department of Justice announced Monday.

Walgreens has agreed to pay as much as $350 million to settle illegally filled prescriptions for addictive opioid drugs and false reimbursement claims to the federal government, the Justice Department announced Monday.