What substance is the active opioid ingredient in House’s Vicodin?

Hydrocodone is the active opioid ingredient in House’s Vicodin.

In House M.D., Gregory House regularly uses Vicodin to manage chronic leg pain caused by an infarction in his quadriceps muscle. Vicodin is a combination prescription medicine containing hydrocodone and acetaminophen, also known as paracetamol outside the United States.

Hydrocodone is the opioid component responsible for the drug’s analgesic and dependence-related effects, while acetaminophen is a non-opioid pain reliever. The show repeatedly uses House’s Vicodin use to explore pain, addiction, judgment, and professional impairment.

The medication is often confused with oxycodone-based products because both are prescription opioids and both appear in discussions of pain treatment. Vicodin is not simply a brand name for oxycodone. Its formulation also matters medically: excessive acetaminophen can damage the liver, even when the opioid component is not the immediate concern.