You had a rapid virological response. Undetected at 4 weeks is one of the best markers in achieving a sustained virological response. Your odds have been increased because of early response so there is no need to subject your body to those strong medications after completion of 48 weeks.
Good luck. You're almost to the end.
Diamond_Lil
How is your blood work doing? If you were UND at week 4 and throughout treatment I would stop at 48 weeks. What you may gain by going 52 weeks which is very little at this point will not effect the total outcome at the end.
jep