Dilaudid is a powerful opioid drug that's primarily designed to relieve severe pain. It's an analgesic, meaning that it works best when used in conjunction with other pain medications, and can help to improve overall health and well-being by reducing stress and helping people get out of bed in the morning. Dilaudid is a highly potent opioid painkiller that is also used to treat moderate to severe pain and severe chronic pain. It is a Schedule II controlled substance, meaning it can be used in medical settings but must be prescribed by a doctor and registered.