I am bipolar 1, rapid cycling. I was diagnosed with active hep C some years ago. They did a liver biopsy and tons of bloodwork to confirm the disease. I was told at the time that the interferon could have some bearing on my bpolar, esp. the depression. After weighing the alternatives (I have grandbabies!) I decided to have some faith and just go ahead with recommended course of treatment which was interferon. I had 17 months of 3 x a week self injections and worked very closely with my therapist, pdoc, gastroenterologist, and family doctor. I also had a good support network of friends. The main things I remember were feeling like I had the flu and being very tired. I also had memory problems, and yes some depression. But, it was do-able. Today I have no detectable viral load (8+ years!!) and my liver function tests come back completely normal. You may feel alone, but you're not. Let me know how you are doing. Been there, done that.
"When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us."--Helen Keller