If I have been taking 4mg of dilaudid 4x a day and was switched to oxycodone 15mg 4x a day. Is this a comparable dose? I have needed to take 30mg 4x a day in order to arrest my pain adequately.Can anyone tell me how many mgs of oxycodone = 4mg of dilaudid(hydromorphone)? I was switched because I've been on dilaudid for 8yrs and have developed a tolerance(duh).