Dilaudid is a very powerfull opoid...its one of the most powerfull ones on the market,,,I'd procede with caution,,if your haveing adverse side effects with oxy[which is also an opoid] then you may acrew even worse reactions in later stages,,or early on with it, forwhich it is srtronger than the oxy in some aspects,,,liver damage and heart attacks are also a concern ,,,all pain meds are brutal on the liver and exspecially on the heart.,,,and as with any medication,a tolerance level always builds,,which over time the dose will increase to surpress the same level of pain inadvertantly,,,,,,,,,,