Dilaudid, generically known as Hydromorphone or dihydromorphinone is a morphinan opioid to treat moderate to severe pain. Usually to treat long term pain due to cancer. Buy Dilaudid online today and get it home delivered and start your treatment right away. It can be consumed orally or by injection into the vein, muscle or under the skin. It works in the brain and changes how your body feels and responds to the pain.