THANKS FOR GETTING BACK ON THIS. REVRAT
Prevacid is a Protein Pump Inhibitor (PPI) like Aciphex, Nexium and Prilosec. It's indicated for GERD (chronic acid reflux) and as far as I know has nothing to do with treating Hep C, other than if you happen to have GERD. I believe Prilosec is a generic sold OTC but not 100% sure so speak to your doctor and pharmacist regarding switching off.