Almost all Chinese viewers learn this word from House M.D. (《豪斯医生》) — outside that show, Vicodin's brand presence in China is minimal. The transliteration is loose: 维可丁 ≈ Vi-ko-din.
American medical drama (2004-2012) where Hugh Laurie's character is famously addicted to Vicodin — single-handedly responsible for the drug's name recognition in Chinese-speaking audiences.