You need to treat, non-stop for 24 weeks. You won't know if you achieved SVR until you stop treatment. When you stop, you have to start all over again. You need to get your 12 weeks of generics before you run out or its back to square one. I have 8 weeks extra I am keeping in reserve until I hit SVR 12. I can "loan" you however many you need in order not to interupt your tx.