I've been on Harvoni for 10 weeks and I have not experienced any side effects until last week.
I started having pain in the upper left side of my back. The pain is higher than where my kidneys are located. It goes from being a dull pain, resembling a pulled muscle, to a sharp stabbing pain when moving a certain way. The pain is so intense that it takes my breathe away. I have not done anything to actually pull a muscle in my back. The pain is getting worse every day.
Has anyone else experienced this type of pain since starting Harvoni?