I took Ambien (still do) and while it didn't give me a full nights sleep an hour after I took it I could put my head on the pillow and zonk right out (and I was on TONS of ribavirin my serum level was extremely high). I seemed like most people to wake up after about 4 hours (even on the CR Ambien time release) but I could fall back asleep again. And again. And again. So I got some sleep. It did help. Most docs have no problem prescribing sleeping meds for hep patients - they know how difficult it can be.
It's probably the ribivirin causing the sleep issues. Try to take the evening dose about 5 in the afternoon so it will interfere less with your sleep. I used diphenhydramine (Benedryl) to sleep while on TX, starting with 50 mg and working up to 200 mg by 6 months of TX. Lunesta and Ambien are also excellent, but have more side effects and slight withdrawal issues.
I take Ambein also. I have found that when I wake up in the middle of the night, I will immediately take half of one. This will usually put me back to sleep.
I take ambein. You have no problem going to sleep but sometimes I wake in th night and can't go back to sleep. Some good nights some very bad. To me the ativa doesn't work as well