If a doctor was already prescribing lots of Percocet and Vicodin, a rep was sent out to deliver a pitch about OxyContin’s potency and longer-lasting action. The higher the decile—a term reps use as a predictor of a doctor’s potential for prescribing whatever drug they’re hawking—the more visits that doctor received from a rep, who often brought along “reminders” such as OxyContin-branded clocks for the exam-room walls.