OxyContin maker Purdue Pharma LP said on Saturday that it has cut its sales force in half and will stop promoting opioids to physicians, following widespread criticism of the ways that drugmakers market addictive painkillers.

The drugmaker said it will inform doctors on Monday that its sales representatives will no longer visit physician offices to discuss its opioid products. It will now have about 200 sales representatives, Purdue said.

"We have restructured and significantly reduced our commercial operation and will no longer be promoting opioids to prescribers," the Stamford, Connecticut-based company said in a statement.