Peg INF With Ribavirin Treatment For HCV Genotype 3, Just

peg INF with ribavirin treatment for HCV genotype 3, just completed . But rise of SGPT of abot 56U/L. What may be the cause. RNA for hepatitis C negative at 8 wks, positive at 12 weeks, again negative at 14 weeks, 24 weeks and 36 weeks , Then treatment stopped. At the beginning SGPT raised, became normalby 12 weeks again raised 4 weeks after stopping of treatment. What is the interpretation and what should I do?