Dilaudid (hydromorphone) is a powerful opioid analgesic used to manage severe pain, particularly in cases where other pain medications are ineffective. It works by altering pain signals in the brain and nervous system, providing significant relief from pain. Dilaudid is typically reserved for short-term use due to its high potential for abuse and addiction. Common side effects include dizziness, nausea, and drowsiness. It is essential to follow the prescribed dosage closely.