and is proven to cure up to 99% of patients who've have had no prior treatment with 12 weeks. certain patients can be cured with just 8 weeks of harvoni. before starting harvoni, your doctor will test to see if you've ever had hepatitis b, which may flare up and cause serious liver problems during and after harvoni treatment. tell your doctor if you've ever had hepatitis b, a liver transplant, other liver or kidney problems, hiv or any other medical conditions and about all the medicines you take including herbal supplements. taking amiodarone with harvoni can cause a serious slowing of your heart rate. common side effects of harvoni include tiredness, headache and weakness. ready to let go of hep c? ask your hep c specialist about harvoni. politico quotes a senior republican source blaming house speaker paul ryan for the collapse of the republican farm bill last week. obviously the house freedom caucus is to blame but this is the problem when you have a lame duck speaker who announces he's leaving eight months in advance.