I have been on Harvoni since November 19, 2014. I have a six month treatment as I have between stage 4-5 Cirrhosis. I had little or no side effects for 4 months and then started experiencing fatigue and some head aches for a few days. But, recently I have been feeling depressed and in a light foggy mood. By the way, I have been undetectable since the first month's results and am very grateful. Anyone else experience any issues with moods?