OxyContin, introduced in 1995, was Purdue Pharma's breakthrough palliative for chronic pain. Under a marketing strategy that Arthur Sackler had pioneered decades earlier, the company aggressively pressed doctors to prescribe the drug, wooing them with free trips to pain-management seminars and paid speaking engagements. Sales soared. The drug was marketed as "smooth and sustained pain control all day and all night" when taken on a 12-hour schedule and as having lower abuse potential than immediate-release oxycodone because of its time-release properties, even though there was no scientific evidence backing that conclusion and the addictive nature of opiates had been known for thousands of years. In these early years, Purdue Pharma was aware of OxyContin abuse, including "reports that the pills were being crushed and snorted; stolen from pharmacies; and that some doctors were being charged with selling prescriptions," according to "The New York Times", based on a confidential Justice Department report that was revealed in May 2018. Over a hundred internal company memos between 1997 and 1999 included the words "street value," "crush," or "snort."