They are worried about the ribivirin, which caused birth defects in lab animals. Wait the full 6 months and if you are still paranoid, wait a little longer. The docs seem to feel pretty positive that the riba will be out of your system completely after 6. People who have treatment after affects are not complaining about the drugs still working in them, but other things.
I did the treatment about 6-years ago for the first time. I have a 2 1/2-year-old who is as normal and beautiful both physically and mentally as she could be.
Joey