How safe is Dilaudid

I'm in the hospital and I'm getting 1mg dilaudid iv, every 4hrs. I haven't been taking it every 4 hrs but like three or four times a day. I've noticed I've been feeling real wobbly, not even sure if it's the dilaudid or not. I have a wobbly feeling like I'm sitting on a boat bobbing in the water. I think it's my heart as it beats it causes this wobbly type feeling. I've had ekg it showed sinus tachy, nothing new there. I'm wondering though could it be something else or is it time to get off the pain med.

When I first get the med I feel fine, but later I feel shakey, wobbly, sometimes queasy and have this constant ringing in my ears. As I said I'm also taking potassium iodide oral, steroids iv, and finished the chemotherapy mec regiment on the 19th of November. Anyone have a clue to these symptoms.