I understand it to be that Rebetol
(the Schering-Plough ribavirin) is dosed at 1000 mg for 65-85 kilo, and Copegus (the Roche ribavirin) is dosed at 1200 mg for 75 kilos up. So are you on Pegasys and Copegus then, since you have been on 1200 mg ribavirin?
At your weight of 77 kilo, 1200 mg is 15.58 mg per kilo, and 1000 mg is 12.98 mg per kilo. I've heard that between 13-15 mg per kilo is a good amount for geno 1's.