Pharmaceutical salesmen hawking an opioid drug once rapped about pushing doctors to prescribe higher doses — and how much money they were making off those sales — to the tune of A$AP Rocky’s “Fuckin’ Problems.”

“I love titrations, yeah, that’s not a problem, and I got new patients, yeah, I got a lot of ‘em,” one of the salesmen at Insys Therapeutics raps about the fentanyl spray Subsys in a 2015 internal company video. “Titrations” refers to a process in which a physician continually increases a drug’s dosage strength.

Prosecutors played the video Wednesday during the federal racketeering trial of the company’s founder, John Kapoor. He and four other Insys executives have been charged with formulating a nationwide conspiracy to bribe doctors into writing more prescriptions for Subsys, which can be 100 times more powerful than morphine. More than 900 people have died from using the drug since it was approved in 2012 to treat severe cancer-related pain.