"for those in canada suffering from chronic pain, the long-acting version, hydromorph contin, is wonderful when combined with the dilaudid for breakthrough pain. i take 9mg (6mg   3mg pills) twice a day, plus the 4mg of dilaudid for the breakthrough pain. only bad thing i can say about it is that my tolerance level for this, and other medications, is very high. and i&#039;m only 27 years old."