I did the Sovaldi /Ribavirin combo for 12 weeks. It took me 2 months post Tx to start to feel semi normal. It's now been 4 months since ending Tx, and everyday I feel better and better. In fact, have never felt this good my entire life. The medical community says it does take 6 months for the Ribavirin to clear your system. Not sure about the interferon but sure others will chime in.