I am about to start taking Harvoni in a few days. I rcvd tainted blood in 1981 after emergency C section. I have stage 4 cirrhosis cause if it. I take sylymarin Milk Thistle which helps with hep c symptoms. My past experiences of taking medicine for anything like pain pills, antibiotics, sinus medications have all been a problem for me. I have teeth that abscess fairly often and have to take antibiotics and have root canals. What antibiotic would i be able to take if I should get an infection like that or any infection, while taking Harvoni. I'm afraid of it and of a reaction from Harvoni much less if I have to take an antibiotic. Only antibiotics I can take are ciprofloxacin and Zithromax.