It's probably the most notorious prescription drug of our times – OxyContin.

Here in the US, because of widespread abuse and addiction, authorities are clamping down on it, and other opium-based painkillers. So the companies that make opioid drugs are looking overseas boost sales, and that's causing concern among medical officials.

The international push is coming from a group of companies, known as Mundipharma.

Los Angeles Times journalist Harriet Ryan spoke with A Martinez about her reporting.

To listen to the full interview, click on the blue media player above.