I can speak to you as a patient, what happened to me and the drugs I used are different from your situation.
My enzymes were almost up to 1,000 after my liver was resected and was told they needed to get up to almost 2,000 before my liver would fail.
They went down again to the low 200's before I started chemo and then went up to the 700's. I was done with chemo in June of '05 and they have slowly gone down again.
One thing that helped me is, I started eating organic food. That dropped my liver enzymes about 100 points.
So, I wouldn't worry unless the Dr.'s get worried. The liver is a great organ and has the ability to heal itself.
I hope this helped.