Dilaudid is a semi-synthetic opioid analgesic with multiple mechanisms of action that are likely responsible for its high potency, duration of action, and relatively low cost. Its principal therapeutic effects are analgesia and sedation. Our online pharmacy provides you with the highest quality of medication for your pain at an affordable price. Order today and get it delivered right to your door. The higher strengths of this drug should be used only if you have been regularly taking moderate to large amounts of opioid pain medication. These strengths may cause overdose if taken by a person who has not been regularly taking opioids.