Dilaudid (Hydromorphone) is an opioid medication that treats severe pain by blocking pain signals in your brain. The brand name of this medication is Dilaudid. because it is use used to help relieve moderate to severe pain. It works in the brain to change how your body feels and responds to pain. Buy Dilaudid online safely from pharmacy because Some pharmacy websites operate legally and offer convenience, privacy, cost savings and safeguards for purchasing medicines.