New York Daily News, October 2, 2003:
[Former Limpbaugh housekeeper Wilma Cline] also gave the Enquirer a ledger documenting how many pills she claimed to have bought for him – 4,350 in one 47-day period – and E-mails she claimed Limbaugh sent her.
In one missive, Limbaugh pushed Cline to get more “little blues” – code for OxyContin, the powerful narcotic nicknamed hillbilly heroin, she said.
“You know how this stuff works … the more you get used to, the more it takes,” the May 2002 E-mail reads. “But I will try and cut down to help out.”
To which I only need to add this image helpfully supplied by John at AMERICAblog: