The company announced its surprise reversal on Saturday. Purdue’s statement said it eliminated more than half its sales staff this week and would no longer send sales representatives to doctors’ offices to discuss opioid drugs. Its remaining sales staff of about 200 will focus on other medications.

The OxyContin pill, a time-release version of oxycodone, was hailed as a breakthrough treatment for chronic pain when it was approved in late 1995. It worked over 12 hours to maintain a steady level of oxycodone in patients suffering from a wide range of pain ailments. But some users quickly discovered they could get a heroin-like high by crushing the pills and snorting or injecting the entire dose at once. In 2010 Purdue reformulated OxyContin to make it harder to crush and stopped selling the original form of the drug.