I Have Upcoming Surgery Next Week And Was Discussing With

I have upcoming surgery next week and was discussing with surgeon that I already take percoset for back-knee and shoulder pain ,and once before I took a much stronger medication (after a knee replacement) I think it was Dilaudid think it was a 4 or 5 mg ( it wasn't time released ) I can't take anything time released because of prior stomach surgery My question is what is the strongest strength of dilaudid to take by prescription